Update options.md

Adressing nextauthjs/next-auth#2709 (comment)

Author: balazsorban44

docs/configuration/options.md

@@ -120,7 +120,7 @@ session: {
 
 #### Description
 
-JSON Web Tokens can be used for session tokens if enabled with `session: { jwt: true }` option. JSON Web Tokens are enabled by default if you have not specified a database.
+JSON Web Tokens can be used for session tokens if enabled with `session: { session: "jwt" }` option. JSON Web Tokens are enabled by default if you have not specified a database.
 
 By default JSON Web Tokens are encrypted (JWE). We recommend you keep this behavoiur, but you can override it by defining your own `encode` and `decode` methods.