Fix linter issues with ReadMe (#84)

* Use an emoji for Contributors title

Emoji Used: Champion Cup
Aligns with the rest of the titles

Why Champion Cup you ask? Well, Contributors are champions too! 😎

* Don't use inline HTML in markdown

Always use markdown format if possible.
This format to represent image with a link is supported by most markdown parsers.

* Fix grammatical errors in markdown

These were reported by Spell Checker extension (by EWSoftware) in VS IDE.

* Use canonical language-agnostic URLs

Microsoft Docs provide language-specific content for docs published
to the website but in-order for devs in specific region to get locally
translated content, we need to put language-agnostic canonical URLs.

This is usually done by removing any language and region specific info from URLs.

Reported by Docs markdown linter in VSCode.

README.md

@@ -9,13 +9,13 @@
 
 ## 👀 What does this repo contain?
 
-This repository contains several .NET libraries (originally developed as part of the [Windows Community Toolkit](https://github.com/CommunityToolkit/WindowsCommunityToolkit)) that can be used both by application developers (regardless on the specific UI framework in use, they work everywhere!) as well as library authors. These libraries are also being used internally at Microsoft to power many of our first party apps (such as the new Microsoft Store) and constantly improved by listening to feedbacks from other teams, external partners and other developers from the community. Here's a quick breakdown of the various components you'll find in this repository:
+This repository contains several .NET libraries (originally developed as part of the [Windows Community Toolkit](https://github.com/CommunityToolkit/WindowsCommunityToolkit)) that can be used both by application developers (regardless on the specific UI framework in use, they work everywhere!) and library authors. These libraries are also being used internally at Microsoft to power many of our first party apps (such as the new Microsoft Store) and constantly improved by listening to feedbacks from other teams, external partners and other developers from the community. Here's a quick breakdown of the various components you'll find in this repository:
 
-- [`CommunityToolkit.Mvvm` (aka MVVM Toolkit)](https://docs.microsoft.com/en-us/windows/communitytoolkit/mvvm/introduction): a fast, modular, platform agnostic MVVM library, which is the official successor of `MvvmLight`. It's used extensively in the Microsoft Store and other first party apps.
+- [`CommunityToolkit.Mvvm` (aka MVVM Toolkit)](https://docs.microsoft.com/windows/communitytoolkit/mvvm/introduction): a fast, modular, platform-agnostic MVVM library, which is the official successor of `MvvmLight`. It's used extensively in the Microsoft Store and other first party apps.
 - `CommunityToolkit.Mvvm.SourceGenerators`: the source generators to augment the MVVM Toolkit.
-- [`CommunityToolkit.Diagnostics`](https://docs.microsoft.com/en-us/windows/communitytoolkit/diagnostics/introduction): a set of helper APIs (specifically, [`Guard`](https://docs.microsoft.com/en-us/windows/communitytoolkit/developer-tools/guard) and [`ThrowHelper`](https://docs.microsoft.com/en-us/windows/communitytoolkit/developer-tools/throwhelper)) that can be used for cleaner, more efficient and less error prone argument validation and error checking.
-- [`CommunityToolkit.HighPerformance`](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/introduction) a collection of helpers for working in high-performance scenarios. It includes APIs such as [pooled buffer helpers](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/memoryowner), a fast [string pool](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/stringpool) type, a 2D variant of `Memory<T>` and `Span<T>` ([`Memory2D<T>`](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/memory2d) and [`Span2D<T>`](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/span2d)) also supporting discontiguous regions, helpers for bit shift operations (such as [`BitHelper`](https://docs.microsoft.com/en-us/windows/communitytoolkit/high-performance/span2d), also used in [Paint.NET](https://www.getpaint.net/)), and more.
-- [`CommunityToolkit.Common`](https://docs.microsoft.com/en-us/dotnet/api/?term=communitytoolkit.common): a set of helper APIs shared with other CommunityToolkit libraries.
+- [`CommunityToolkit.Diagnostics`](https://docs.microsoft.com/windows/communitytoolkit/diagnostics/introduction): a set of helper APIs (specifically, [`Guard`](https://docs.microsoft.com/windows/communitytoolkit/developer-tools/guard) and [`ThrowHelper`](https://docs.microsoft.com/windows/communitytoolkit/developer-tools/throwhelper)) that can be used for cleaner, more efficient and less error-prone argument validation and error checking.
+- [`CommunityToolkit.HighPerformance`](https://docs.microsoft.com/windows/communitytoolkit/high-performance/introduction) a collection of helpers for working in high-performance scenarios. It includes APIs such as [pooled buffer helpers](https://docs.microsoft.com/windows/communitytoolkit/high-performance/memoryowner), a fast [string pool](https://docs.microsoft.com/windows/communitytoolkit/high-performance/stringpool) type, a 2D variant of `Memory<T>` and `Span<T>` ([`Memory2D<T>`](https://docs.microsoft.com/windows/communitytoolkit/high-performance/memory2d) and [`Span2D<T>`](https://docs.microsoft.com/windows/communitytoolkit/high-performance/span2d)) also supporting discontiguous regions, helpers for bit shift operations (such as [`BitHelper`](https://docs.microsoft.com/windows/communitytoolkit/high-performance/span2d), also used in [Paint.NET](https://www.getpaint.net/)), and more.
+- [`CommunityToolkit.Common`](https://docs.microsoft.com/dotnet/api/?term=communitytoolkit.common): a set of helper APIs shared with other CommunityToolkit libraries.
 
 ## 🙌 Getting Started
 
@@ -48,10 +48,8 @@ For more information see the [.NET Foundation Code of Conduct](CODE_OF_CONDUCT.m
 
 This project is supported by the [.NET Foundation](http://dotnetfoundation.org).
 
-## Contributors
+## 🏆 Contributors
 
-<a href="https://github.com/CommunityToolkit/dotnet/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=CommunityToolkit/dotnet" />
-</a>
+[![Toolkit Contributors](https://contrib.rocks/image?repo=CommunityToolkit/dotnet)](https://github.com/CommunityToolkit/dotnet/graphs/contributors)
 
 Made with [contrib.rocks](https://contrib.rocks).