Bump pylint-django from 2.4.4 to 2.5.5

Bumps [pylint-django](https://github.com/PyCQA/pylint-django) from 2.4.4 to 2.5.5.
- [Release notes](https://github.com/PyCQA/pylint-django/releases)
- [Changelog](https://github.com/pylint-dev/pylint-django/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/PyCQA/pylint-django/commits)

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

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

requirements.txt

@@ -29,7 +29,7 @@ google-crc32c==1.3.0
 wagtail-color-panel==1.4.0
 django-debug-toolbar==3.2.1
 pylint==2.8.3
-pylint-django==2.4.4
+pylint-django==2.5.5
 ipython
 django-redis==5.4.0
 redis==5.0.1