Update cmake.yml: use Ninja generator

.github/workflows/cmake.yml

@@ -75,11 +75,14 @@ jobs:
     - name: Fetch dependencies
       run: python ./tools/fetch_dawn_dependencies.py --use-test-deps --shallow
 
+    - name: Set up Ninja
+      uses: seanmiddleditch/gha-setup-ninja@master
+
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
       run: >
-        cmake -B ${{ steps.strings.outputs.build-output-dir }}
+        cmake -G Ninja -B ${{ steps.strings.outputs.build-output-dir }}
         -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
         -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
         -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}