fix(doc) update README

Co-authored-by: Saúl Ibarra Corretgé <saghul@jitsi.org>

README.md

@@ -27,7 +27,7 @@ And many more!
 
 ## Using Jitsi Meet
 
-Using Jitsi Meet is straightforward, as it's browser based. Head over to [meet.jit.si](https://meet.jit.si) and give it a try. It's anonymous, scalable and free to use. All browsers are supported! 
+Using Jitsi Meet is straightforward, as it's browser based. Head over to [meet.jit.si](https://meet.jit.si) and give it a try. It's scalable and free to use. All you need is a Google, Facebook or GitHub account in order to start a meeting. All browsers are supported!
 
 Using mobile? No problem, you can either use your mobile web browser or our fully-featured
 mobile apps: