fix: update upload-artifact action to version 4 in GitHub Actions workflow

Author: marc-hanheide

.github/workflows/update_cache.yaml

@@ -62,7 +62,7 @@ jobs:
 
       - name: Upload CSV files as artifacts
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: csv-files
           path: ./output/*.csv