Update chartlets.js/README.md

Co-authored-by: b-yogesh <[email protected]>

Author: forman

chartlets.js/README.md

@@ -1,6 +1,6 @@
 # chartlets 
 
-Chartlets is a software frameworks that allows websites developed with
+Chartlets is a software framework that allows websites developed with
 React to be extended by server-side widgets programmed in Python or other
 programming languages.