fix: use new domain in issue template

Author: sds100

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: false
 contact_links:
   - name: Need help using the app?
-    url: http://keymapper.club?utm_source=issue_template_chooser
+    url: http://keymapper.app/discord?utm_source=issue_template_chooser
     about: Join the Discord server and let us help you