Improve pull request description template

.github/pull_request_template.md

@@ -1,22 +1,26 @@
-<!-- Thank you for submitting a pull request! Find more information in our development guide at https://github.com/trinodb/trino/blob/master/.github/DEVELOPMENT.md and contact us on #dev in Slack. -->
-<!-- Provide an overview of the PR for maintainers and reviewers. -->
+<!-- Thank you for submitting a pull request! Find more information 
+at https://trino.io/development/process.html, 
+at https://github.com/trinodb/trino/blob/master/.github/DEVELOPMENT.md 
+and contact us on #core-dev in Slack. -->
+<!-- Provide an overview for maintainers and reviewers. -->
 ## Description
 
 
 
-<!-- Provide details that would help an engineer who is unfamiliar with this part of the code. -->
+<!-- Provide details that help an engineer who is unfamiliar with this part of the code. -->
 ## Additional context and related issues
 
 
 
-<!-- Mark the appropriate option with an (x). Propose a release note if you can. -->
+<!-- Mark the appropriate option with an (x). Propose a release note if you can.
+More info at https://trino.io/development/process#release-note -->
 ## Release notes
 
 ( ) This is not user-visible or is docs only, and no release notes are required.
 ( ) Release notes are required. Please propose a release note for me.
 ( ) Release notes are required, with the following suggested text:
 
 ```markdown
-# Section
+## Section
 * Fix some things. ({issue}`issuenumber`)
 ```