add cargo toml fmt to CI

.github/workflows/check-pull-request.yml

@@ -56,6 +56,19 @@ jobs:
           restore-keys: ${{ runner.os }}-cargo-lint-
       - run: cargo clippy --workspace --all-features --all-targets ${{ env.CARGO_ARGS }} -- -D warnings
 
+  cargo-toml-fmt:
+    runs-on: ubuntu-latest
+    container: "tamasfe/taplo:0.7.0-alpine"
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Run Taplo fmt
+        run: taplo fmt --check
+
+      - name: Fail-fast; cancel other jobs
+        if: failure()
+        uses: andymckay/cancel-action@0.2
+
   test:
     if: ${{ !startsWith(github.head_ref, 'release/') }}
     name: Test