cargo-deny: Run for all push events to the main branch

Author: Turbo87

.github/workflows/ci.yml

@@ -89,7 +89,7 @@ jobs:
     name: Backend / cargo-deny
     runs-on: ubuntu-22.04
     needs: changed-files
-    if: needs.changed-files.outputs.rust-lockfile == 'true'
+    if: github.event_name != 'pull_request' || needs.changed-files.outputs.rust-lockfile == 'true'
 
     env:
       RUSTFLAGS: "-D warnings"