Update fichier-markdown.md

module1/exo2/fichier-markdown.md

 *WE WERE ON A BREAK
 **THEY KNOW WE KNOW THEY KNOW**
 https://www.fun-mooc.fr/en/cours/gerer-son-entreprise-autrement/
-print("Hello world!")
+`Hello world`
 *  MOUNTAIN
     *  APPLES
     *  CHERRIES