docs: fix method link in AuthClient doc

Author: belltoy

src/rpc/auth.rs

@@ -96,7 +96,7 @@ impl AuthClient {
 
     /// Sends an authenticate request.
     /// Note that this does not set or update client-side authentication settings.
-    /// Call [`set_client_auth`] to set or update client-side authentication.
+    /// Call [`set_client_auth`][`Self::set_client_auth`] to set or update client-side authentication.
     #[inline]
     pub async fn authenticate(
         &mut self,