Explicitly install rustfmt inthe format job in CI

Author: JSorngard

.github/workflows/rust.yml

@@ -19,6 +19,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@stable
+        components: rustfmt
     - name: Cache
       uses: Swatinem/[email protected]
     - name: Format