[deps] Update django requirement from <=5.3.0,>=4.2.0 to >=4.2.0,<=6.0.1

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@4.2...6.0.1)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 6.0.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 # Supports Django 4.2 through 5.2, including release candidates
-django>=4.2.0,<=5.3.0
+django>=4.2.0,<=6.0.1
 openwisp-utils @ https://github.com/openwisp/openwisp-utils/archive/refs/heads/1.3.tar.gz
 jsonfield>=3.1.0,<4.0.0
 cryptography~=46.0.3