chore: update pull request template (#437)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,14 +1,21 @@
 ### Summary
 
-_Remove this paragraph and describe the code changes in your pull request... were there any bugs you had fixed? If so, mention them. If these bugs have open GitHub issues, tag them here as well to keep the conversation linked._
+<!--
+  Describe the code changes in your pull request here - were there any bugs you had fixed, features you added, tradeoffs you made?
+  If so, mention them. If these changes have open GitHub issues, tag them here as well to keep the conversation linked.
+-->
 
 ### Pull Request checklist
-_Remove this line after checking all the items here. If the item does not apply to the PR, both check it out and wrap it by `~`._
+
+<!-- If any of the items on this checklist do not apply to the PR, both check it out and wrap it by `~`. -->
 
 - [ ] Add/update test to cover these changes
 - [ ] Update documentation
 - [ ] Update CHANGELOG file
 
 ### Other Information
 
-_Remove this paragraph and mention other important and relevant information, such as benchmarks._
+<!--
+  Mention any other important information that might relate to this PR but that don't belong in the summary,
+  like detailed benchmarks or possible follow-up changes.
+-->