backend-sample-app.py

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 15.0.6 to 15.0.7.
- [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](https://github.com/testing-library/react-testing-library/compare/v15.0.6...v15.0.7

)

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

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