Bump django from 3.1.13 to 3.1.14 in /requirements

Bumps [django](https://github.com/django/django) from 3.1.13 to 3.1.14.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.1.13...3.1.14)

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

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

Author: dependabot[bot]

requirements/base.txt

@@ -1,4 +1,4 @@
-Django==3.1.13
+Django==3.1.14
 psycopg2==2.9.4
 django-environ==0.4.5
 djangorestframework==3.12.2