Replace Google Group with Discussions

Author: dkocher

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: true
 contact_links:
-  - name: Cyberduck Google Group
-    url: http://groups.google.com/group/cyberduck
+  - name: Discussions
+    url: https://github.com/iterate-ch/cyberduck/discussions
     about: Please ask and answer questions here.