docs: Update links help center links that redirect "/user-roles".

Follow-up to #32553.

docs/overview/changelog.md

@@ -2527,7 +2527,7 @@ _Released 2021-05-13_
 - Code blocks now have a copy-to-clipboard button and can be
   integrated with external code playgrounds, making it convenient to
   work with code while discussing it in Zulip.
-- Added a new organization [Moderator role][roles-and-permissions].
+- Added a new organization [Moderator role][user-roles].
   Many permissions settings for sensitive features now support only
   allowing moderators and above to use the feature.
 - Added a native Giphy integration for sending animated GIFs.
@@ -2556,7 +2556,7 @@ _Released 2021-05-13_
 - Added support for moving topics to private streams, and for configuring
   which roles can move topics between streams.
 
-[roles-and-permissions]: https://zulip.com/help/roles-and-permissions
+[user-roles]: https://zulip.com/help/user-roles
 
 #### Upgrade notes for 4.0
 
@@ -3091,7 +3091,7 @@ possible CVE-2020-14215 caused a user to incorrectly join as an
 organization administrator in the past. See the release blog post for
 details.
 
-[audit-org-admin]: https://zulip.com/help/change-a-users-role
+[audit-org-admin]: https://zulip.com/help/user-roles
 
 ### Zulip Server 2.1.4
 

docs/production/authentication-methods.md

@@ -609,7 +609,7 @@ other IdPs (identity providers). You can configure it as follows:
    IdP.
 
 [saml-help-center]: https://zulip.com/help/saml-authentication
-[user-role-help-center]: https://zulip.com/help/roles-and-permissions
+[user-role-help-center]: https://zulip.com/help/user-roles
 
 ### IdP-initiated SSO
 

docs/production/management-commands.md

@@ -121,9 +121,9 @@ There are dozens of useful management commands under
   to one or more users.
 - `./manage.py change_realm_subdomain`: Change subdomain of a realm.
 - `./manage.py change_user_email`: Change a user's email address.
-- `./manage.py change_user_role`: Can change are user's role
+- `./manage.py change_user_role`: Can change a user's role
   (easier done [via the
-  UI](https://zulip.com/help/change-a-users-role)) or give bots the
+  UI](https://zulip.com/help/user-roles)) or give bots the
   `can_forge_sender` permission, which is needed for certain special API features.
 - `./manage.py export_single_user`: does a limited version of the [main
   export tools](export-and-import.md) containing just

docs/production/mobile-push-notifications.md

@@ -99,7 +99,7 @@ manage your plan, the same plans are offered for all Zulip versions.
 ### Plan management for a Zulip organization
 
 On a self-hosted Zulip server running Zulip 8.0+, [organization
-owners](https://zulip.com/help/roles-and-permissions) and billing administrators
+owners](https://zulip.com/help/user-roles) and billing administrators
 can conveniently access plan management from the Zulip app. See [help center
 documentation](https://zulip.com/help/self-hosted-billing) for detailed
 instructions.