Revise pull request template for clarity and focus

Updated the pull request template to clarify checklist items and added optional focus areas for reviewers.

Author: Jibola

.github/workflows/PULL_REQUEST_TEMPLATE.md

@@ -26,13 +26,13 @@
 - [ ] Is the intention of the code captured in relevant tests?
 - [ ] If there are new TODOs, has a related JIRA ticket been created?
 
-### Checklist for Reviewer {@primary_reviewer}
+### Checklist for Reviewer
 
 - [ ] Does the title of the PR reference a JIRA Ticket?
 - [ ] Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
 - [ ] Have you checked for spelling & grammar errors?
 - [ ] Is all relevant documentation (README or docstring) updated?
 
-## Focus Areas for Reviewer
+## Focus Areas for Reviewer (Optional)
 
 <!-- List any complex portion of code you believe needs additional scrutiny and explain why.  -->