tryout to fix duplicate ci runs the other way

Author: m1rm

.github/workflows/ci.yml

@@ -2,13 +2,13 @@ name: CI
 
 on:
     push:
+      branches:
+        - main
     pull_request:
+      branches:
+        - main
     workflow_dispatch:
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
     lint:
         runs-on: ubuntu-latest