Update portal.en.md

01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/07.course-level-up/portal.en.md

@@ -1,5 +1,7 @@
 ---
 title: 'course : level+1'
+published: false
+visible: false
 hero_classes: ''
 hero_image: ''
 ---