Bump govuk_app_config from 9.16.0 to 9.16.1

Bumps [govuk_app_config](https://github.com/alphagov/govuk_app_config) from 9.16.0 to 9.16.1.
- [Changelog](https://github.com/alphagov/govuk_app_config/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_app_config@v9.16.0...v9.16.1)

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

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