Update GitHub issue template

Closes gh-39

Author: rainboyan

ISSUE_TEMPLATE.md

@@ -1,7 +1,7 @@
 Thanks for reporting an issue for Grace plugins, please review the task list below before submitting the 
 issue. Your issue report will be closed if the issue is incomplete and the below tasks not completed.
 
-NOTE: If you are unsure about something and the issue is more of a question a better place to ask questions is on Stack Overflow (http://stackoverflow.com/tags/grace-plugins). 
+NOTE: If you are unsure about something and the issue is more of a question a better place to ask questions is on GitHub Discussions (https://github.com/orgs/graceframework/discussions). 
 DO NOT use the issue tracker to ask questions.
 
 ### Task List