build(deps): Update django-debug-toolbar requirement (#1514)

Updates the requirements on [django-debug-toolbar](https://github.com/django-commons/django-debug-toolbar) to permit the latest version.
- [Release notes](https://github.com/django-commons/django-debug-toolbar/releases)
- [Changelog](https://github.com/django-commons/django-debug-toolbar/blob/main/docs/changes.rst)
- [Commits](django-commons/django-debug-toolbar@5.2.0...6.0.0)

---
updated-dependencies:
- dependency-name: django-debug-toolbar
  dependency-version: 6.0.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

pyproject.toml

@@ -53,7 +53,7 @@ dependencies = [
     "django-heroku>=0.3.1,<0.4.0",
 
     # Development & Debugging
-    "django-debug-toolbar>=5.2.0,<6.0.0",
+    "django-debug-toolbar>=5.2.0,<7.0.0",
     "ruff>=0.8.0,<1.0.0",
 
     # Testing