[HOTFIX] Modify pull request template

Author: jackylk

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,18 +1,15 @@
-Be sure to do all of the following checklist to help us incorporate 
-your contribution quickly and easily:
-
- - [ ] Any interfaces changed?
+ ### Why is this PR needed?
 
- - [ ] Any backward compatibility impacted?
 
- - [ ] Document update required?
+ ### What changes were proposed in this PR?
+
+    
+ ### Does this PR introduce any user interface change?
+ - No
+ - Yes. (please explain the change and update document)
 
- - [ ] Testing done
-        Please provide details on 
-        - Whether new unit test cases have been added or why no new tests are required?
-        - How it is tested? Please attach test report.
-        - Is it a performance related change? Please attach the performance test report.
-        - Any additional information to help reviewers in testing this change.
-       
- - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA. 
+ ### Is any new testcase added?
+ - No
+ - Yes
 
+