Bump django

Bumps [django](https://github.com/django/django) from 3.0.13 to 3.1.14.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.0.13...3.1.14)

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

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

Author: dependabot[bot]

ch03/myproject_virtualenv/src/django-myproject/requirements/_base.txt

@@ -5,7 +5,7 @@ certifi==2020.12.5
 cffi==1.12.3
 cssselect2==0.2.2
 defusedxml==0.6.0
-Django==3.0.13
+Django==3.1.14
 django-appconf==1.0.3
 django-crispy-forms==1.11.1
 django-elasticsearch-dsl==7.1.4