Update django-debug-toolbar requirement from <4.2,>=2.2 to >=2.2,<4.3

Updates the requirements on [django-debug-toolbar](https://github.com/jazzband/django-debug-toolbar) to permit the latest version.
- [Release notes](https://github.com/jazzband/django-debug-toolbar/releases)
- [Changelog](https://github.com/jazzband/django-debug-toolbar/blob/main/docs/changes.rst)
- [Commits](https://github.com/jazzband/django-debug-toolbar/compare/2.2...4.2)

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

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

requirements.txt

@@ -1,7 +1,7 @@
 # These requirements are only necessary when developing on Oscar.
 
 # development
-django-debug-toolbar>=2.2,<4.2
+django-debug-toolbar>=2.2,<4.3
 django-extensions>=2.2,<3.3
 psycopg2-binary>=2.8,<2.10