chore(deps): update dependency django-stubs to v6

Author: renovate[bot]

requirements-dev.txt

@@ -1,7 +1,7 @@
 -r requirements-lint.txt
 -r requirements-test.txt
 -r requirements.txt
-django-stubs[compatible-mypy]==5.2.9
+django-stubs[compatible-mypy]==6.0.2
 mypy==1.19.1
 PyICU
 translate-toolkit