feat: add skip mfa tip (#1275)

Author: wangsijie

docs/end-user-flows/mfa/configure-mfa.mdx

@@ -28,6 +28,10 @@ Follow these steps to enable MFAs in users' Logto sign-in flow:
      - **Ask users to set up MFA during registration**: New users will be prompted to set up MFA during registration, and existing users will see the prompt at their next sign-in. Users can skip this step, and it won't appear again.
      - **Ask users to set up MFA on their sign-in after registration**: New users will be prompted to set up MFA at their second sign-in after registration, and existing users will see the prompt at their next sign-in. Users can skip this step, and it won't appear again.
 
+:::tip
+If you need to prompt a user again after they skipped MFA enrollment, reset their skip state so the setup screen appears the next time they sign in. Admins can use the Management API (`PATCH /api/users/{userId}/logto-configs`), and developers building self-service flows can call the Account API (`PATCH /api/my-account/logto-configs`). [Management API reference](https://openapi.logto.io/operation/operation-updateuserlogtoconfig) · [Account API reference](https://openapi.logto.io/operation/operation-updatelogtoconfig)
+:::
+
 <img src="/img/assets/configure-mfa.png" alt="MFA settings" />
 
 ### Organization-level MFA configuration \{#organization-level-mfa-configuration}