Update cmake.yml

Try installing library dependencies

.github/workflows/cmake.yml

@@ -20,6 +20,9 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
+    - name: Install library dependencies
+      run: sudo apt-get install -y sdl2-dev
+
     - 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
@@ -28,4 +31,3 @@ jobs:
     - name: Build
       # Build your program with the given configuration
       run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
-