Update index.mdx (#401)

Author: max-koro

docs/topics/users/consent/index.mdx

@@ -63,6 +63,7 @@ Mutations marked with the symbol ⮂ are eligible for [server-to-server consent]
 
 - [`closeAccount`](https://api-reference.swan.io/mutations/close-account/)
 - [`finalizeOnboarding`](https://api-reference.swan.io/mutations/finalize-onboarding/) ⮂
+- [`updateAccountSettings`](https://api-reference.swan.io/mutations/update-account-settings/) ⮂
 
 <h3 id="sensitive-account-memberships">Account memberships</h3>