shorten the title for PR template

PULL_REQUEST_TEMPLATE.md

@@ -1,16 +1,16 @@
-## What is the type of this PR?
+## Type
 
 <!-- e.g. Bug Fix, Feature, Code Quality Improvement, UI Polish... -->
 
-## Any background context and/or relevant tickets/issues you want to provide with?
+## Context
 
 <!-- e.g. GitHub issue #45 -->
 
-## Short description on what this PR suppose to do?
+## Description
 
 <!-- e.g. Adding genuine check to the onboarding -->
 
-## Any special conditions required for testing?
+## Testing
 
 <!-- e.g. Clear db, add special env variable.. -->