Update textbook.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md

@@ -4,8 +4,8 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: brainstorming-123-mathematical-tools
-      order: 2
+    - slug: brainstorming-g12-mathematical-tools
+      order: 3
     - slug: brainstorming-234-mathematical-tools
       order: 1
 ---