build(deps): bump django from 3.2.14 to 3.2.15 in /requirements

Bumps [django](https://github.com/django/django) from 3.2.14 to 3.2.15.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.2.14...3.2.15)

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

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

requirements/requirements.txt

@@ -62,7 +62,7 @@ jsonfield2==4.0.0.post0
 geoip2==4.5.0
 ipip-ipdb==1.6.1
 # Django environment
-Django==3.2.14
+Django==3.2.15
 django-bootstrap3==14.2.0
 django-filter==2.4.0
 django-formtools==2.2