Merge pull request #24 from striezel-stash/actions-checkout-update

Update actions/checkout in GitHub Actions workflow to v4

.github/workflows/rust.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - name: Deps
       run: sudo apt-get install -y libxkbcommon-x11-dev
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests