CI: Use maintained GitHub Action for Rust dtolnay/rust-toolchain (#23)

Author: olleolleolle

.github/workflows/build.yml

@@ -27,9 +27,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Rust
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
+        uses: dtolnay/rust-toolchain@stable
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1