update a broken link

Author: untitaker

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,8 @@
 blank_issues_enabled: true
 contact_links:
-  - name: Rayhunter Mattermost
-    url: https://opensource.eff.org/signup_user_complete/?id=6iqur37ucfrctfswrs14iscobw&md=link&sbr=su
-    about: If you're having trouble using Rayhunter and aren't sure you've found a bug or request for a new feature, please first try asking for help here. There is a much larger community there of people familiar with the project who will be able to more quickly answer your questions.
+  - name: Questions and community
+    url: https://efforg.github.io/rayhunter/support-feedback-community.html
+    about: If you're having trouble using Rayhunter and aren't sure you've found a bug or request for a new feature, please first try asking for help on GitHub discussions or Mattermost
   - name: Rayhunter Security Policy
     url: https://github.com/EFForg/rayhunter/security/advisories/new
     about: Please report security vulnerabilities here.