Update token types in concepts.md

src/guide/concepts.md

@@ -92,7 +92,7 @@ In the regular course of business, Passwordless.dev uses two important types of
 - A **registration token**, created by the private API from requests to the `/register/token` endpoint ([learn more](api.md#register-token)). Your frontend will register this token with the end-user's device for use in sign-in operations.
 - An **authentication token**, created by the public API from calls to the `.signin()` method ([learn more](frontend/javascript.md#signinwith)). Your backend will verify this token to complete a sign-in operation (via the `/signin/verify` endpoint).
 
-Additionally, Passwordless.dev uses two other types of tokens for special purposes:
+Additionally, Passwordless.dev uses other types of tokens for special purposes:
 
 - A **manually generated authentication token**, created by the private API from requests to the `/signin/generate-token` endpoint. This token carries the same weight as a regular authentication token, but is generated manually, side-stepping the usual authentication flow. It's primarily used facilitate account recovery and sign-in via magic links.