Update django requirement from <5.3,>=5.2 to >=5.2,<6.1

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@5.2...6.0)

---
updated-dependencies:
- dependency-name: django
  dependency-version: '6.0'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -8,7 +8,7 @@ dependencies = [
     "blurhash-python>=1.2.2",
     "cachetools>=5.5.0",
     "dateparser>=1.2.0",
-    "django>=5.2,<5.3",
+    "django>=5.2,<6.1",
     "django-anymail[mailgun,amazon-ses,sendgrid,mailjet,postal,mandrill,mailersend,brevo]>=13.0",
     "django-auditlog>=3.0.0",
     "django-bleach>=3.1.0",