Update index.md

Author: yoyomyo

index.md

@@ -10,7 +10,7 @@ This site is where I document the things I read/created.
 
 # Projects
 [Cross device](https://firebase.google.com/codelabs/cross-device-controller#0)
-Realtime cross device communication built with Firebase and Flutter.
+Realtime cross device communication built with FlutterFire.
 
 [Bezier](./bezier.html)
 My attempt to move an old drawing project from C++ to JavaScript.