Javascript and ECMAscript differences (#54)

Adding a blog on Javascript and ECMAscript differences in "ES6 and above" section.

Author: BRAINIAC2677

readme.md

@@ -107,6 +107,7 @@ Thin books which you can get through in a few days.
 - [ES6 Katas](http://es6katas.org) - Learn ES6 by solving unit test online.
 - [Practical ES6](https://github.com/mjavascript/practical-es6) - eBook with practical examples and advices.
 - [30 seconds of code](https://github.com/Chalarangelo/30-seconds-of-code) - Useful ES6 snippets that you can understand in 30 seconds or less.
+- [What’s the difference between JavaScript and ECMAScript?](https://www.freecodecamp.org/news/whats-the-difference-between-javascript-and-ecmascript-cba48c73a2b5/) - Clears the confusion about ES6 and Javascript.
 
 ## DOM related