Update cheatsheet.fr.md

01.curriculum/01.physics-chemistry-biology/03.niv3/04.electromagnetism/02.magnetostatics/02.magnetostatics-overview/cheatsheet.fr.md

@@ -1,10 +1,10 @@
 ---
-title : magnetostatics-overview
-published : true
-visible : true
+title: magnetostatics-overview
+published: true
+visible: true
 lessons:
   - slug: gravitation-electrostat-magnetostat
-  - order:3
+    order: 3
 ---
 
 <!--titre partie principale : MAGNÉTOSTATIQUE -->