Update ES2019.MD

Author: daumann

Diff for: ES2019.MD

@@ -2,7 +2,7 @@
 
 See the [ES2019 standard](http://www.ecma-international.org/ecma-262/10.0/) for full specification of the ECMAScript 2019 language.
 
-ES10 includes the following new feature proposals:
+ES2019 includes the following new feature proposals:
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->