fix: use rust-toolchain action

.forgejo/workflows/build.yaml

@@ -22,6 +22,11 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - uses: github.com/dtolnay/rust-toolchain@nightly
+        id: rust-toolchain
+        with:
+          targets: x86_64-unknown-linux-musl
+          toolchain: minimal
       - uses: actions/cache@v4
         with:
           path: |
@@ -32,10 +37,6 @@ jobs:
             ~/.cargo/git/db/
             target/
           key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
-      - name: Setup rust
-        run: |
-          rustup target add x86_64-unknown-linux-musl
-          rustup toolchain install nightly --profile minimal --target x86_64-unknown-linux-musl
       - name: Build
         run: cargo build --release --locked --target x86_64-unknown-linux-musl
       - name: Strip