Rollback to v3 for actions/upload-artifact (#666)

Author: oojacoboo

.github/workflows/continuous_integration.yml

@@ -78,7 +78,7 @@ jobs:
         run: "composer cs-check"
 
       - name: "Archive code coverage results"
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: "codeCoverage"
           path: "build"