build(deps): bump wagtail-localize from 1.9 to 1.9.1

Bumps [wagtail-localize](https://github.com/wagtail/wagtail-localize) from 1.9 to 1.9.1.
- [Release notes](https://github.com/wagtail/wagtail-localize/releases)
- [Changelog](https://github.com/wagtail/wagtail-localize/blob/main/CHANGELOG.md)
- [Commits](wagtail/wagtail-localize@v1.9...v1.9.1)

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

Signed-off-by: dependabot[bot] <[email protected]>