Bump django from 3.2.7 to 3.2.8

Bumps [django](https://github.com/django/django) from 3.2.7 to 3.2.8.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.2.7...3.2.8)

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

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

requirements-dev.txt

@@ -1,5 +1,5 @@
 -r docs/requirements.txt
-django==3.2.7
+django==3.2.8
 black==21.9b0
 isort==5.9.3
 flake8==3.9.2