Use v4

Author: CarlGao4

.github/workflows/build.yml

@@ -98,7 +98,7 @@ jobs:
           node-version: 12
 
       - name: Download webmscore package tarball
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: npm-pack
           path: web-example
@@ -109,7 +109,7 @@ jobs:
           npm i ./webmscore-*.tgz
           npm start
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: example-exports
           path: web-example/exported*