Bump @testing-library/react from 13.4.0 to 15.0.5 (#6259)

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 13.4.0 to 15.0.5.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v13.4.0...v15.0.5)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -47,7 +47,7 @@
     "@octokit/rest": "^21.0.2",
     "@polkadot/api": "^13.2.1",
     "@testing-library/jest-dom": "^6.5.0",
-    "@testing-library/react": "^13.4.0",
+    "@testing-library/react": "^15.0.5",
     "axios": "^1.7.7",
     "cloudflare": "^3.5.0",
     "cross-env": "^7.0.3",