Update ci.yml to use cluster

Author: bobbobbio

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
           - os: Linux
             arch: X64
             triple: x86_64-unknown-linux-gnu
-    runs-on: [ self-hosted, release, "${{ matrix.os }}", "${{ matrix.arch }}" ]
+    runs-on: [ self-hosted, cluster, "${{ matrix.os }}", "${{ matrix.arch }}" ]
     steps:
       - name: Install Rust
         uses: risc0/actions-rs-toolchain@v1