fix: install x86_64-unknown-linux-gnu toolchain for musl

.github/workflows/release.yml

@@ -106,6 +106,12 @@ jobs:
         with:
           fetch-depth: ${{ env.FETCH_DEPTH }}
 
+      - name: Install Rust toolchain
+        run: |
+          rustup update --no-self-update stable
+          rustup target add x86_64-unknown-linux-gnu
+          rustup component add rust-src
+
       - name: Dist
         run: cargo xtask dist