Wrong status code in Documentation of Identity API v3 (CURRENT) in keystone

[ruben cordova]

This bug tracker is for errors with the documentation, use the following as a template and remove or add fields as you see fit. Convert [ ] into [x] to check boxes:

- [x] This doc is inaccurate in this way: In the documentation, it says that the status code of "Check whether user has role assignment on project" API is 201, when the system returns a 204 code.
- [ ] This is a doc addition request.
- [ ] I have a fix to the document that I can paste below including example: input and output.

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-----------------------------------
Release: on 2020-09-17 12:45:35
SHA: db25e505a30b10ed8a2a66c4674e20130dd5d5e0
Source: https://opendev.org/openstack/keystone/src/api-ref/source/v3/index.rst
URL: https://docs.openstack.org/api-ref/identity/v3/?expanded=token-authentication-with-unscoped-authorization-detail,password-authentication-with-unscoped-authorization-detail,password-authentication-with-explicit-unscoped-authorization-detail,delete-user-detail,create-project-detail,update-project-detail,change-password-for-user-detail,update-user-detail

[chenwei (chenwei110)]

detail message in https://github.com/openstack/keystone/blob/master/api-ref/source/v3/roles.inc

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/keystone/+/845534

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/keystone/+/845534
Committed: https://opendev.org/openstack/keystone/commit/cdeba521b6b28582e560c673ba1ed1ffbd25ccfc
Submitter: "Zuul (22348)"
Branch: master

commit cdeba521b6b28582e560c673ba1ed1ffbd25ccfc
Author: chenwei <[e-mail]>
Date: Mon Jun 13 10:59:45 2022 +0800

    Change error response status code in master branch

    Closed bug: #1916662

    Change-Id: I3ae502580588af42ac5d5f9fc6718a639b443e98

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/yoga
Review: https://review.opendev.org/c/openstack/keystone/+/863257

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Elod Illes <email address hidden>" on branch: stable/yoga
Review: https://review.opendev.org/c/openstack/keystone/+/863257
Reason: stable/yoga branch of openstack/keystone is about to be deleted. To be able to do that, all open patches need to be abandoned. Please cherry pick the patch to unmaintained/yoga if you want to further work on this patch.