Add redirectUrl parameter to startSSOFlow

Author: LauraBeatris

docs/references/expo/use-sso.mdx

@@ -39,6 +39,13 @@ function startSSOFlow(startSSOFlowParams: StartSSOFlowParams): Promise<StartSSOF
 
   ---
 
+  - `redirectUrl?`
+  - `string`
+
+  The full URL or path to redirect to after the OAuth flow is complete.
+
+  ---
+
   - `unsafeMetadata?`
   - [`SignUpUnsafeMetadata`](/docs/references/javascript/types/metadata#sign-up-unsafe-metadata)