fix Apple Silicon runner image identifier

Signed-off-by: Anjan Roy <[email protected]>

.github/workflows/test_ci.yml

@@ -12,18 +12,14 @@ jobs:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
+        # From https://github.com/actions/runner-images#available-images
         os: [ubuntu-latest, 
              macos-latest, # Intel Mac
-             macos-latest-xlarge # Apple M1 Mac
+             macos-latest-xl # Apple M1 Mac
             ]
 
     steps:
     - uses: actions/checkout@v4
-    # From https://github.com/marketplace/actions/actions-setup-cmake
-    - name: Setup CMake
-      uses: jwlawson/[email protected]
-      with:
-        cmake-version: 'latest'
     - name: Setup Google-Test
       run: |
         pushd ~