Update django requirement from <5.0 to <6.0

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@1.0...5.1)

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

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

setup.cfg

@@ -46,7 +46,7 @@ djangocms_page_meta = *.html *.png *.gif *js *jpg *jpeg *svg *py *mo *po
 
 [options.extras_require]
 docs =
-	django<5.0
+	django<6.0
 	sphinx>2,<6
 	djangocms-page-tags