Upgrade actions/upload to v4

Author: rshriver

.github/workflows/npm-prod.yml

@@ -20,7 +20,7 @@ jobs:
       run: npm install
     - name: Build dev prod
       run: npm run build:prod
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: PlayList-prod
         path: build