[Infra] update issue templates (#3513)

* chore(infra): update issue templates

* chore(infra): update pull request template

* chore(infra): update bug report template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,20 +1,25 @@
+<!--
 Thanks for opening a PR!
 Since this is a volunteer project and is very active, anything you can do to reduce the amount of time needed to review and merge your PR is appreciated.
 The following steps will help get your PR merged quickly:
 
-#### Update the documentation
+- Update the documentation
 If you've added new functionality, update the README.md with an entry for your prop or event.
 The entry should be inserted in alphabetical order.
 
-#### Update the changelog
-After you open the PR, update the CHANGELOG.md file with an entry pointing to your PR.
-
-#### Provide an example of how to test the change
+- Provide an example of how to test the change
 If the PR requires special testing setup provide all the relevant instructions and files. This may include a sample video file or URL, configuration, or setup steps.
 
-#### Focus the PR on only one area
-Testing multiple features takes longer than isolated changes and if there is a bug in one feature, prevents the other parts of your PR from getting merged until it gets fixed.
+- Focus the PR on only one area
 If you're touching multiple different areas that aren't related, break the changes up into multiple PRs.
 
-#### Describe the changes
+- Describe the changes
 Add a note describing what your PR does. If there is a change to the behavior of the code, explain why it needs to be updated.
+-->
+## Summary
+
+### Motivation
+
+### Changes
+
+## Test plan