Bump django-imagekit from 5.0.0 to 6.0.0 (#13414)

Bumps [django-imagekit](https://github.com/matthewwithanm/django-imagekit) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/matthewwithanm/django-imagekit/releases)
- [Commits](matthewwithanm/django-imagekit@5.0...6.0)

---
updated-dependencies:
- dependency-name: django-imagekit
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -10,7 +10,7 @@ django-pghistory==3.8.3
 django-dbbackup==5.0.0
 django-environ==0.12.0
 django-filter==25.1
-django-imagekit==5.0.0
+django-imagekit==6.0.0
 django-multiselectfield==1.0.1
 django-polymorphic==4.1.0
 django-crispy-forms==2.4