fix: use test-package script

Author: sebjacobs

.github/workflows/ci.yml

@@ -51,7 +51,11 @@ jobs:
         working-directory: ./packages/scratch-gui
         run: |
           npm run build
-          npm run test
+
+      - name: Test scratch-gui
+        uses: ./.github/actions/test-package
+        with:
+          package_name: scratch-gui
 
       - name: Publish scratch-gui to GitHub Packages
         working-directory: ./packages/scratch-gui