chore(deps-dev): bump @contentful/app-scripts (#9068)

Bumps the dev-dependencies group in /examples/javascript with 1 update: [@contentful/app-scripts](https://github.com/contentful/create-contentful-app/tree/HEAD/packages/contentful--app-scripts).


Updates `@contentful/app-scripts` from 1.27.0 to 1.29.0
- [Release notes](https://github.com/contentful/create-contentful-app/releases)
- [Changelog](https://github.com/contentful/create-contentful-app/blob/main/packages/contentful--app-scripts/CHANGELOG.md)
- [Commits](https://github.com/contentful/create-contentful-app/commits/@contentful/[email protected]/packages/contentful--app-scripts)

---
updated-dependencies:
- dependency-name: "@contentful/app-scripts"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

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

examples/javascript/package.json

@@ -38,7 +38,7 @@
     ]
   },
   "devDependencies": {
-    "@contentful/app-scripts": "1.27.0",
+    "@contentful/app-scripts": "1.29.0",
     "@testing-library/jest-dom": "5.17.0",
     "@testing-library/react": "14.3.1",
     "cross-env": "7.0.3"