Update...

Update 10.temporary-m3p2/16.waves/20.n2/10.concept-of-wave-and-wave-phenomena-2/20.overview/cheatsheet.fr.md

10.temporary-m3p2/16.waves/20.n2/10.concept-of-wave-and-wave-phenomena-2/20.overview/cheatsheet.fr.md

@@ -28,6 +28,10 @@ lessons:
         slug: temporary-work-axis-wave-22
         name: SITUATION-1 : les ondes
         order: 2
+    -  
+        slug: stationary-waves-and-art-fr
+        name: SCIENCE-&-ART : découvre les ondes stationnaires
+        order: 2
 ---
 
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