Document confidential sso support (#244)

Author: Corentin Mors

documentation/pages/personal/authentication.mdx

@@ -14,11 +14,10 @@ You will be then asked to validate a second factor to register the CLI to your a
 ## Supported primary authentication methods
 
 -   Master Password
--   SSO (self-hosted only)
+-   SSO (self-hosted)
+-   Confidential SSO (using Nitro Enclaves)
 
-<Callout type="warning">
-    Confidential SSO (using Nitro Enclaves) and Password-Less authentication are not supported yet.
-</Callout>
+<Callout type="warning">Password-Less authentication is not supported yet.</Callout>
 
 ### Requirements for SSO authentication