Merge pull request #303 from HachemiH/master

Add video on "Hello, world!" page in french language

Author: HachemiH

1-js/02-first-steps/01-hello-world/article.md

@@ -1,4 +1,6 @@
 # Hello, world!
+ 
+<iframe width="560" height="315" src="https://www.youtube.com/embed/0WS0zqhT5fM" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 
 Cette partie du tutoriel est à propos du coeur de JavaScript, le langage lui même.