Replace Javascript with JavaScript (#4502)

free-podcasts-screencasts-en.md

@@ -15,7 +15,7 @@
 * [Gulp](#gulp)
 * [Haskell](#haskell)
 * [Java](#java)
-* [Javascript](#javascript)
+* [JavaScript](#javascript)
   * [Angular.js](#angularjs)
   * [Elm](#elm)
   * [Ember.js](#emberjs)
@@ -137,7 +137,7 @@
 * [Java Pub House](https://player.fm/series/java-pub-house) - Freddy Guime and Bob Paulin (podcast)
 
 
-### Javascript
+### JavaScript
 
 * [FiveJS](https://fivejs.codeschool.com) (podcast)
 * [Free Quality Javascript video tutorials and screencasts](http://www.screencasts.org/topics/javascript) (screencast)