[chore] Add GitHub discussions link

Author: aheritier

README.md

@@ -33,10 +33,11 @@ all records have been fetched, so e.g.
 will iterate through *all* tickets. Most likely you will want to implement your own cut-off process to stop iterating
 when you have got enough data.
 
-Mailing lists
+Community
 -------------
 
 * [Users list](https://groups.google.com/forum/#!forum/zendesk-java-client-users)
+* [GitHub discussions](https://github.com/cloudbees-oss/zendesk-java-client/discussions)
 
 Status
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