Bump django-treebeard from 4.7.1 to 4.8.0

Bumps [django-treebeard](https://github.com/django-treebeard/django-treebeard) from 4.7.1 to 4.8.0.
- [Changelog](https://github.com/django-treebeard/django-treebeard/blob/master/CHANGES.md)
- [Commits](django-treebeard/django-treebeard@4.7.1...4.8.0)

---
updated-dependencies:
- dependency-name: django-treebeard
  dependency-version: 4.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -76,7 +76,7 @@ django-extensions==4.1
 django-stagingcontext==0.1.0
 django-ga-context==0.1.0
 django-impersonate==1.9.5
-django-treebeard==4.7.1
+django-treebeard==4.8.0
 django-pagetree==1.5.0
 django-pageblocks==1.3.0  # pyup: <2.0.0
 django-quizblock==1.3.2