Update command-fmt.yml (#5054)

Add cargo +nightly fmt

.github/workflows/command-fmt.yml

@@ -37,6 +37,13 @@ jobs:
           GH_TOKEN: ${{ github.token }}
       - name: Run FMT
         run: |
+          cargo --version
+          rustc --version
+          cargo +nightly --version
+          rustc +nightly --version
+          
+          cargo +nightly fmt
+          
           # format toml.
           # since paritytech/ci-unified:bullseye-1.73.0-2023-11-01-v20231204 includes taplo-cli
           taplo format --config .config/taplo.toml