pip: (deps): bump willow from 1.11.0 to 1.12.0

Bumps [willow](https://github.com/wagtail/Willow) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/wagtail/Willow/releases)
- [Changelog](https://github.com/wagtail/Willow/blob/main/docs/changelog.rst)
- [Commits](wagtail/Willow@v1.11.0...v1.12.0)

---
updated-dependencies:
- dependency-name: willow
  dependency-version: 1.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-prod.txt

@@ -89,6 +89,6 @@ wagtail==7.1.2
 wagtail_trash==3.2.0
 wagtail_modeladmin==2.2.0
 webencodings==0.5.1
-Willow==1.11.0
+Willow==1.12.0
 zipp==3.23.0
 -r requirements-prod-ingestion.txt