chore(deps): bump whitenoise from 6.8.1 to 6.8.2 in /backend

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 6.8.1 to 6.8.2.
- [Changelog](https://github.com/evansd/whitenoise/blob/main/docs/changelog.rst)
- [Commits](evansd/whitenoise@6.8.1...6.8.2)

---
updated-dependencies:
- dependency-name: whitenoise
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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