ci(lint): adjust triggering logic to reduce wasted runs on main, now …

…just pr [skip ci]

.github/workflows/lint.yml

@@ -1,16 +1,9 @@
 ---
 name: lint
 on:
-  # Run CI against all pushes (direct commits, also merged PRs), Pull Requests
-  push:
+  pull_request:
     branches:
       - main
-      - stable-*
-  pull_request:
-  # Run CI once per day (at 06:00 UTC)
-  # This ensures that even if there haven't been commits that we are still testing against latest version of ansible-test for each ansible-base version
-  # schedule:
-  #   - cron: '0 6 * * *'
   workflow_dispatch:
 
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