Update cheatsheet.fr.md

12.temporary_ins/32.sets-systems/30.n3/27.systems-deterministic/20.overview/cheatsheet.fr.md

@@ -11,6 +11,10 @@ lessons:
         slug: systems-deterministic-with-differential-equations-3
         name: OUTIL-MATH-3 : Bottom-up and differential equations
         order: 2
+    - 
+        slug: systems-chaotic-3
+        name: PARALLÈLE-3 : Chaotic systems
+        order: 1
 ---
 
 
@@ -45,4 +49,4 @@ $`\def\PSclosed{\mathscr{S}_{\displaystyle\tiny\bigcirc}}`$
 
 #### Systèmes DÉTERMINISTES
 
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\ No newline at end of file
+---------------------------