[skip ci] update the issue template of bug report (less#3785)

Author: iChenLei

.github/ISSUE_TEMPLATE/bug.md

@@ -8,6 +8,7 @@ assignees: ''
 
 **To reproduce:**
 
+<!-- If the issue you reported requires a complex codebase to reproduce, please provide a replicable method such as a Github repository, Codesandbox link, Stackblitz link, or other relevant method for maintainers to investigate your feedback effectively. Thanks ! -->
 ```less
 // less code here
 ```