Bump django from 3.1.7 to 3.2.25 in /tests

Bumps [django](https://github.com/django/django) from 3.1.7 to 3.2.25.
- [Commits](django/django@3.1.7...3.2.25)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

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

tests/requirements.txt

@@ -3,7 +3,7 @@ bleach==3.3.0
 bumpversion==0.6.0
 certifi==2020.12.5
 chardet==4.0.0
-Django==3.1.7
+Django==3.2.25
 docutils==0.16
 entrypoints==0.3
 flake8==3.8.4