Docs: Fix headings in Layouts and Pages (vercel#73268)

docs/01-app/01-getting-started/02-layouts-and-pages.mdx

@@ -3,7 +3,6 @@ title: How to create layouts and pages
 nav_title: Layouts and Pages
 description: Learn how to create layouts and pages in your Next.js application, and link between them.
 related:
-  title: Learn more about the features mentioned in this page.
   links:
     - app/api-reference/file-conventions/layout
     - app/api-reference/file-conventions/page
@@ -84,11 +83,7 @@ export default function DashboardLayout({ children }) {
 }
 ```
 
-The layout above is called a [root layout](/docs/app/api-reference/file-conventions/layout#root-layouts) because it's defined at the root of the `app` directory.
-
-### Root Layout (Required)
-
-The root layout is defined at the top level and wraps all routes. This layout is **required** and must contain `html` and `body` tags.
+The layout above is called a [root layout](/docs/app/api-reference/file-conventions/layout#root-layouts) because it's defined at the root of the `app` directory. The root layout is **required** and must contain `html` and `body` tags.
 
 ## Creating a nested route
 
@@ -175,7 +170,7 @@ export default function Page() {
 
 > **Good to know**: Wrapping a folder name in square brackets (e.g. `[slug]`) creates a special **dynamic route segment** used to generate multiple pages from data. This is useful for blog posts, product pages, etc. Learn more about [dynamic segments](/docs/app/building-your-application/routing/dynamic-routes).
 
-### Nesting layouts
+## Nesting layouts
 
 By default, layouts in the folder hierarchy are also nested, which means they wrap child layouts via their `children` prop. You can nest layouts by adding `layout` inside specific route segments (folders).
 
@@ -207,7 +202,7 @@ export default function BlogLayout({ children }) {
 
 If you were to combine the two layouts above, the root layout (`app/layout.js`) would wrap the blog layout (`app/blog/layout.js`), which would wrap the blog (`app/blog/page.js`) and blog post page (`app/blog/[slug]/page.js`).
 
-## Linking between pages
+## Linking between pages
 
 You can use the [`<Link>` component](/docs/app/api-reference/components/link) to navigate between routes. `<Link>` is a built-in Next.js component that extends the HTML `<a>` tag to provide prefetching and client-side navigation.