docs/releases/4.0.5.txt from django/django

docs/releases/4.0.5.txt

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Django 4.0.5 release notes
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*June 1, 2022*

Django 4.0.5 fixes several bugs in 4.0.4.

Bugfixes
========

* Fixed a bug in Django 4.0 where not all :setting:`OPTIONS <CACHES-OPTIONS>`
  were passed to a Redis client (:ticket:`33681`).

* Fixed a bug in Django 4.0 that caused a crash of ``QuerySet.filter()`` on
  ``IsNull()`` expressions (:ticket:`33705`).

* Fixed a bug in Django 4.0 where a hidden quick filter toolbar in the admin's
  navigation sidebar was focusable (:ticket:`33725`).