Build x86_64-unknown-linux-gnu on Rocky Linux 8

.github/workflows/release.yaml

@@ -36,6 +36,7 @@ jobs:
           - os: ubuntu-20.04
             target: x86_64-unknown-linux-gnu
             code-target: linux-x64
+            container: rockylinux:8
           - os: ubuntu-20.04
             target: aarch64-unknown-linux-gnu
             code-target: linux-arm64
@@ -62,6 +63,14 @@ jobs:
         with:
           fetch-depth: ${{ env.FETCH_DEPTH }}
 
+      - name: Install toolchain dependencies
+        if: matrix.container == 'rockylinux:8'
+        shell: bash
+        run: |
+          dnf install -y gcc
+          curl --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused -fsSL "https://sh.rustup.rs" | sh -s -- --profile minimal --default-toolchain none -y
+          echo "${CARGO_HOME:-$HOME/.cargo}/bin" >> $GITHUB_PATH
+
       - name: Install Rust toolchain
         run: |
           rustup update --no-self-update stable