add a format check

.github/workflows/rust-ci.yml

@@ -19,14 +19,14 @@ jobs:
            uses: actions/checkout@v3
            with:
             submodules: recursive
-         - name: Install Python
-           run: sudo apt-get install python3
          - name: Install cargo-audit
            run: cargo install cargo-audit
          - name: Build
            run: cargo build --verbose
          - name: Test
            run: cargo test --verbose
+         - name: Fmt
+           run: cargo fmt --check
          - name: Clippy
            run: cargo clippy --verbose --all -- -D warnings
          - name: Audit