Bump django from 3.1.12 to 3.1.13

Bumps [django](https://github.com/django/django) from 3.1.12 to 3.1.13.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.1.12...3.1.13)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 Click==7.0
-Django==3.1.12
+Django==3.1.13
 djangorestframework==3.11.2
 Jinja2==2.11.3
 livereload==2.6.1