Generalize our Readme to appeal to JavaScript & TypeScript users (#6078)

javascript library instead of TS library
(mimics other frameworks)

README.md

@@ -1,7 +1,7 @@
 # Fluid
 
-The Fluid Framework is a TypeScript library for building distributed, real-time collaborative web
-applications.
+The Fluid Framework is a library for building distributed, real-time collaborative web
+applications using JavaScript or TypeScript.
 
 ## Getting started using the Fluid Framework