Update deprecated actions/upload-artifact from v3 to v4

Fix GitHub Actions CI failure caused by deprecated upload-artifact v3 action.
Update to v4 as recommended in the deprecation notice.

Author: mvalancy

.github/workflows/ci.yml

@@ -105,7 +105,7 @@ jobs:
         run: npm run build
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-artifacts
           path: |