Merge pull request #4 from jaqx0r/renovate/actions-checkout-4.x

chore(deps): update actions/checkout action to v4

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
         compiler: [gcc, clang]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: install dependencies
         run: sudo apt-get install -y scons libgl1-mesa-dev freeglut3-dev ${{ matrix.compiler }}
       - name: build