Simplify GitHub PR template (#47486)

Author: tbradsha

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,39 +1,27 @@
-<!--- Provide a general summary of your changes in the Title above -->
-<!-- Would you like this feature to be tested by Beta testers?
-Please add testing instructions to projects/plugins/jetpack/to-test.md in a new commit as part of your PR. -->
-<!-- a12s: If you have an expected version that you're aiming for the PR to add, please use the Milestone field to communicate it. If you leave it blank, that indicates there isn't a preference. -->
-
 Fixes #
 
-## Proposed changes:
+## Proposed changes
 <!--- Explain what functional changes your PR includes -->
-*
+* 
 
-### Other information:
-
-- [ ] Have you written new tests for your changes, if applicable?
-- [ ] Have you checked the E2E test CI results, and verified that your changes do not break them?
-- [ ] Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?
+### Other information
+<!-- Check the box below to generate a changelog entry. -->
+- [ ] Generate changelog entries for this PR (using AI).
 
-## Jetpack product discussion
-<!-- If you're an Automattician, include a shortlink to the p2 discussion with Jetpack Product here. -->
-<!-- Make sure any changes to existing products have been discussed and agreed upon -->
+## Related product discussion/links
+<!-- If you're an Automattician, include a shortlink to the P2, Slack, and/or Linear discussions here. -->
+* 
 
 ## Does this pull request change what data or activity we track or use?
 <!--- If so, please add the "[Status] Needs Privacy Updates" label and explain what changes there are. -->
 <!--- Check existing Jetpack support documents for a preview of the information we need. -->
 
-## Testing instructions:
+## Testing instructions
 <!-- If you were reviewing this PR, how would you like the instructions to be presented? -->
 <!-- Please include detailed testing steps, explaining how to test your change. -->
-<!-- Bear in mind that context you working on is not obvious for everyone.  -->
-<!-- Adding "simple" configuration steps will help reviewers to get to your PR as quickly as possible. -->
-<!-- "Before / After" screenshots can also be very helpful when the change is visual. -->
+<!-- Bear in mind that context you are working on is not obvious for everyone.  -->
+<!-- Adding relevant configuration steps will help reviewers to get to your PR as quickly as possible. -->
+<!-- "Before"/"After" screenshots can be helpful when the change is visual. -->
 
 * Go to '..'
 *
-
-## Changelog
-<!-- Check one of the boxes below. -->
-
-- [ ] Generate changelog entries for this PR (using AI).