Bump django from 3.1.10 to 3.1.12

Bumps [django](https://github.com/django/django) from 3.1.10 to 3.1.12.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.1.10...3.1.12)

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

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

requirements.txt

@@ -18,7 +18,7 @@ coreschema==0.0.4
 coverage==5.3
 cssselect==1.1.0
 dj-database-url==0.5.0
-Django==3.1.10
+Django==3.1.12
 django-cors-headers==3.3.0
 django-environ==0.4.5
 django-filter==2.4.0