workflow: update issue template

Author: ulivz

.github/ISSUE_TEMPLATE/bug_report.md

@@ -17,7 +17,7 @@ about: Create a report to help us improve
 
 #### Steps to reproduce
 
-<!-- You should provide a reproduction repository. That takes guessing work out of the way and saves us time  -->
+<!-- If you are reporting a bug that can ONLY be reproduced on your repository, PLEASE provide this repo link. That takes guessing work out of the way and saves us time. -->
 
 #### What is expected?