Update portal.en.md

01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/02.paraxial-optics-simple-elements/03.lens/07.lens-level-up/portal.en.md

@@ -1,7 +1,7 @@
 ---
 title: 'curso : nivel+1'
 published: false
-visible: flase
+visible: false
 ---
 
 curso : nivel+1