Update actions/checkout action to v4

.github/workflows/sonar_cloud.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     container: osgeo/gdal:ubuntu-small-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Install dependencies