Update django requirement from <4.3,>=4.2 to >=4.2,<5.1

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@4.2...5.0)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-django>=4.2,<4.3
+django>=4.2,<5.1
 djangorestframework>=3.12,<3.15
 markdown>=3.2,<3.6
 django-filter>=2.4,<23.4