Try to use the same rust version as in other jobs

.github/workflows/main.yml

@@ -104,6 +104,7 @@ jobs:
       contents: read
     steps:
     - uses: actions/checkout@v4
+    - uses: dtolnay/rust-toolchain@stable
     - uses: Swatinem/rust-cache@v2
     - name: Check formatting
       run: cargo fmt --all --check