chore(Template): update PR template (#5559)

Author: ArgoZhang

.github/pull_request_template.md

@@ -1,43 +1,39 @@
 ## Link issues
-
 fixes #{issue number}
+<!--
 [Please fill in the relevant Issue number after the # above, such as #42]
 [请在上方 # 后面填写相关 Issue 编号，如 #42]
-
+-->
 ## Summary By Copilot
 
 
 ## Regression?
-
 - [ ] Yes
 - [ ] No
 
+<!--
 [If yes, specify the version the behavior has regressed from]
 [是否影响老版本]
-
+-->
 ## Risk
-
 - [ ] High
 - [ ] Medium
 - [ ] Low
 
+<!--
 [Justify the selection above]
-
+-->
 ## Verification
-
 - [ ] Manual (required)
 - [ ] Automated
 
 ## Packaging changes reviewed?
-
 - [ ] Yes
 - [ ] No
 - [ ] N/A
 
 ## ☑️ Self Check before Merge
-
 ⚠️ Please check all items below before review. ⚠️
-
 - [ ] Doc is updated/provided or not needed
 - [ ] Demo is updated/provided or not needed
 - [ ] Merge the latest code from the main branch