[enhance](community): polish PULL_REQUEST_TEMPLATE.md (#16499)

.github/PULL_REQUEST_TEMPLATE.md

@@ -8,24 +8,11 @@ Describe your changes.
 
 ## Checklist(Required)
 
-1. Does it affect the original behavior: 
-    - [ ] Yes
-    - [ ] No
-    - [ ] I don't know
-2. Has unit tests been added:
-    - [ ] Yes
-    - [ ] No
-    - [ ] No Need
-3. Has document been added or modified:
-    - [ ] Yes
-    - [ ] No
-    - [ ] No Need
-4. Does it need to update dependencies:
-    - [ ] Yes
-    - [ ] No
-5. Are there any changes that cannot be rolled back:
-    - [ ] Yes (If Yes, please explain WHY)
-    - [ ] No
+* [ ] Does it affect the original behavior
+* [ ] Has unit tests been added
+* [ ] Has document been added or modified
+* [ ] Does it need to update dependencies
+* [ ] Is this PR support rollback (If NO, please explain WHY)
 
 ## Further comments