updating template to request markdown and test case

.github/ISSUE_TEMPLATE.md

@@ -1,9 +1,13 @@
-> This is the place to report a bug, ask a question, suggest an enhancement.
+> This is the place to report a bug, ask a question, or suggest an enhancement.
 
-> This is the place to make a discussion before creating a PR.
+> This is also the place to make a discussion before creating a PR.
 
-> Please label your Issue
+> If this is a bug report, please provide a test case (e.g., your table definition and gh-ost command) and the error output.
 
-> Please understand if this Issue is not addressed immediately or in a timeframe you were expecting.
+> Please use markdown to format code or SQL: https://guides.github.com/features/mastering-markdown/
+
+> Please label the issue on the right (bug, enhancement, question, etc.).
+
+> And please understand if this issue is not addressed immediately or in a timeframe you were expecting.
 
 > Thank you!