Bump django from 3.0.14 to 3.1.13 in /quickstart

Bumps [django](https://github.com/django/django) from 3.0.14 to 3.1.13.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.0.14...3.1.13)

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

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

Author: dependabot[bot]

quickstart/requirements.txt

@@ -1,6 +1,6 @@
 aniso8601==7.0.0
 asgiref==3.2.3
-Django==3.0.14
+Django==3.1.13
 django-filter==2.2.0
 django-graphql-auth==0.3.10
 django-graphql-jwt==0.3.0