ci: skip preflight tests for dependabot PRs (#4791)

Author: dangra

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
 
   preflight:
     # Only run preflight on master pushes, scheduled runs, or pull requests
-    if: ${{ github.event_name == 'schedule' || github.ref == 'refs/heads/master' || github.event_name == 'pull_request' }}
+    if: ${{ (github.event_name == 'schedule' || github.ref == 'refs/heads/master' || github.event_name == 'pull_request') && github.actor != 'dependabot[bot]' }}
     needs: test_build
     uses: ./.github/workflows/preflight.yml
     secrets: inherit