Bump wagtail from 6.2 to 7.2.1

Bumps [wagtail](https://github.com/wagtail/wagtail) from 6.2 to 7.2.1.
- [Release notes](https://github.com/wagtail/wagtail/releases)
- [Changelog](https://github.com/wagtail/wagtail/blob/main/CHANGELOG.txt)
- [Commits](wagtail/wagtail@v6.2...v7.2.1)

---
updated-dependencies:
- dependency-name: wagtail
  dependency-version: 7.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -73,7 +73,7 @@ Unidecode==1.4.0
 
 # wagtail requirements
 laces==0.1.1
-wagtail==6.2
+wagtail==7.2.1
 django-modelcluster>=6.0,<7.0
 django-permissionedforms>=0.1,<1.0
 django-taggit>=5.0.1,<7.0