Clarify that exclude_internal includes project bot users

doc/api/users.md

@@ -67,9 +67,15 @@ GET /users?blocked=true
 
 GitLab supports bot users such as the [alert bot](../operations/incident_management/integrations.md)
 or the [support bot](../user/project/service_desk.md#support-bot-user).
-To exclude these users from the users' list, you can use the parameter `exclude_internal=true`
+You can exclude the following types of [internal users](../development/internal_users.md#internal-users)
+from the users' list, with the `exclude_internal=true` parameter,
 ([introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/241144) in GitLab 13.4).
 
+- Alert bot
+- Support bot
+
+However, this action does not exclude [project bot users](../user/project/settings/project_access_tokens.md#project-bot-users).
+
 ```plaintext
 GET /users?exclude_internal=true
 ```