run tests on PR against all branches except main

Author: iOvergaard

.github/workflows/tests.yml

@@ -6,10 +6,8 @@ name: Tests
 on:
   # Triggers the workflow on push or pull request events but only for the dev branch
   pull_request:
-    branches:
-      - dev
-      - 'v*/dev'
-      - 'v*/contrib'
+    branches-ignore:
+      - 'v*/main'
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch: