Update pinned Rust toolchain action revision (#1635)

* fix: replace rust-toolchain action with rustup commands for toolchain setup

* fix: pin dtolnay/rust-toolchain sha

* pin dtolnay/rust-toolchain sha

Author: kosiew

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Setup Rust
-        uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8
+        uses: dtolnay/rust-toolchain@4be7066ada62dd38de10e7b70166bc74ed198c30
         with:
           toolchain: "nightly"
           components: rustfmt