Update PR template

Author: zhaoqizqwang

.github/pull_request_template.md

@@ -16,7 +16,7 @@
 ## Do we need integration tests and why?
 
 ### For Reviewers
-#### No PR should be approved if PR check fails. Author must provide reason in comment when failed PR check
+#### No PR should be approved if PR check fails. Author must provide reason for bypassing PR checks.
 
 - [ ] All PR checks have passed, or the author has provided reason for bypassing.
 - [ ] Unit tests and necessary integration tests have been added.