Update...

Update 12.temporary_ins/95.electromagnetism-in-media/10.propagation-lhi-media/10.main/textbook.fr.md

12.temporary_ins/95.electromagnetism-in-media/10.propagation-lhi-media/10.main/textbook.fr.md

@@ -5,7 +5,7 @@ routable: false
 visible: false
 lessons:
     - 
-       slug: electromagnetic-waves-propagation-from-vacuum-to-isotropic-media
+       slug: electromagnetic-waves-propagation-from-vacuum-to-isotropic-media-fr
        name: PARALLÈLE-4 : Propagation des ondes EM, du vide aux milieux matériels isotropes
        order: 3
     -