chore: Run `committed HEAD` in addition to `committed develop..HEAD` in CI

This will make the CI detect malformed commit messages pushed straight
to the development branch without a PR.

.woodpecker/check_formatting.yaml

@@ -11,6 +11,7 @@ steps:
     commands:
       - cargo install committed
       - committed develop..HEAD
+      - committed HEAD
       - rustup component add rustfmt
       - cargo fmt --all -- --check
     when: