Update the forum URL

Author: mattbrailsford

.github/ISSUE_TEMPLATE/config.yml

@@ -4,7 +4,7 @@ contact_links:
       url: https://github.com/umbraco/Umbraco.Commerce.Issues/discussions/new?category=ideas
       about: Start a new discussion when you have ideas or feature requests, eventually discussions can turn into plans
     - name: ⁉️ Support Question
-      url: https://our.umbraco.com
+      url: https://forum.umbraco.com
       about: This issue tracker is NOT meant for support questions. If you have a question, please join us on the forum.
     - name: 📖 Documentation Issue
       url: https://github.com/umbraco/UmbracoDocs/issues