chore(deps): bump actions/upload-artifact from 2 to 3 (#6088)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/appengine_deploy.yml

@@ -24,7 +24,7 @@ jobs:
           npm run prepareDemos
 
       - name: Upload
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: appengine_files
           path: _deploy/