Update JWT cookie renewal documentation

Author: ujibang

docs/security/authentication.adoc

@@ -124,7 +124,7 @@ authCookieSetter:
   expires-ttl: 86400     # Defines the duration (in seconds, default 1 day) for which the cookie is valid
 ```
 
-When using JWT tokens, the cookie can be updated by specifying both `?set-auth-cookie&renew-auth-token`. The query parameter `renew-auth-token` forces the `jwtTokenManager` to update the JWT.
+When using JWT tokens, the cookie can be updated by calling `POST /token/cookie?renew`. The query parameter `renew` forces the `jwtTokenManager` to update the JWT.
 
 ===== authCookieHandler