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] <[email protected]>

requirements.txt

@@ -1,4 +1,4 @@
-Django==3.1.10
+Django==3.1.12
 jsonfield2==4.0.0.post0
 Markdown==3.2.2
 nlzss==0.1.2