Clarify why Django 4.0.0 isn't supported (#1054)

* Clarify why Django 4.0.0 isn't supported

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: Andrew-Chen-Wang

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 * #949 Provide django.contrib.auth.authenticate() with a `request` for compatibiity with more backends (like django-axes).
 * #968, #1039 Add support for Django 3.2 and 4.0.
+   * Note: Only Django 4.0.1+ is supported due to a regression in Django 4.0.0. [Explanation](https://github.com/jazzband/django-oauth-toolkit/pull/1046#issuecomment-998015272)
 * #953 Allow loopback redirect URIs using random ports as described in [RFC8252 section 7.3](https://datatracker.ietf.org/doc/html/rfc8252#section-7.3).
 * #972 Add Farsi/fa language support.
 * #978 OIDC: Add support for [rotating multiple RSA private keys](https://django-oauth-toolkit.readthedocs.io/en/latest/oidc.html#rotating-the-rsa-private-key).

README.rst

@@ -35,6 +35,10 @@ capabilities to your Django projects. Django OAuth Toolkit makes extensive use o
 `OAuthLib <https://github.com/idan/oauthlib>`_, so that everything is
 `rfc-compliant <http://tools.ietf.org/html/rfc6749>`_.
 
+Note: If you have issues installing Django 4.0.0, it is because we only support
+Django 4.0.1+ due to a regression in Django 4.0.0. Besides 4.0.0, Django 2.2+ is supported.
+`Explanation <https://github.com/jazzband/django-oauth-toolkit/pull/1046#issuecomment-998015272>`.
+
 Contributing
 ------------