fix(docs) improve documentation that jwt works on websocket

see https://community.jitsi.org/t/lib-jitsi-meet-jwt-support-with-websockets/79806

doc/tokens.md

 
 During configuration you will need to provide the *application ID* that identifies the client and a *secret* shared by both server and JWT token generator. Like described in the RFC, the secret is used to compute a HMAC hash value which allows authentication of the generated token. There are many existing libraries which can be used to implement token generation. More info can be found here: [http://jwt.io/#libraries-io]
 
-JWT token authentication only currently works with BOSH connections.
+JWT token authentication works with BOSH and websocket connections.
 
 [RFC7519]: https://tools.ietf.org/html/rfc7519
 [http://jwt.io/#libraries-io]: http://jwt.io/#libraries-io