Update sso-overview.md to describe disabling password logins for admi…

…ns (#6100)

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Add information about the the new checkbox to control whether or not
administrators can login via password once SSO is configured.

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---------

Co-authored-by: Matt Shaver <[email protected]>

website/docs/docs/cloud/manage-access/sso-overview.md

@@ -43,7 +43,7 @@ Then, assign all of these (and only these) to the user license. This step will a
 
 ## SSO enforcement
 
-* **SSO Enforcement:** If you have SSO turned on in your organization, dbt Cloud will enforce SSO-only logins for all non-admin users. If an Account Admin already has a password, they can continue logging in with a password.
+* **SSO Enforcement:** If SSO is turned on in your organization, dbt Cloud will enforce SSO-only logins for all non-admin users. By default, if an Account Admin or Security Admin already has a password, they can continue logging in with a password. To restrict admins from using passwords, turn off **Allow password logins for account administrators** in the **Single sign-on** section of your organization's **Account settings**.
 * **SSO Re-Authentication:** dbt Cloud will prompt you to re-authenticate using your SSO provider every 24 hours to ensure high security.
 
 ### How should non-admin users log in?