Add Support feedback page to issue template

Author: alexcnichols

.github/ISSUE_TEMPLATE/config.yml

@@ -3,3 +3,6 @@ contact_links:
   - name: GitHub Community Forum
     url: https://github.community/
     about: Ask questions and discuss the roadmap here.
+  - name: GitHub Support - Feedback
+    url: https://support.github.com/contact/feedback
+    about: Share your feedback with the GitHub team.