Update issue templates

Author: tuoping

.github/ISSUE_TEMPLATE/custom.md

@@ -7,4 +7,6 @@ assignees: ''
 
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-Please tag a label to your issue. So we can locate people to solve your problem sooner.
+Issue session is for enhancement suggestions. If your question is otherwise, please go to the discussion session. Thank you for your support. And look forward to working together.
+
+From DeepModeling Community