Update textbook.fr.md

00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/30.n2/20.fr/10.main/textbook.fr.md

@@ -1,6 +1,17 @@
 ---
-title: classical mechanics-n1-fr
+title: Mécanique classique, n2, main
 published: true
 routable: true
 visible: false
----
+lessons:
+    - slug: mecanique-classique-n2-linear
+      order: 1
+    - slug: mecanique-classique-123-panorama
+      order: 2
+    - slug: mecanique-classique-234-panorama
+      order: 2
+    - slug: classical-mechanics-n2-exchange
+      order: 2
+---
+
+### Mécanique classique, n2, main