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

@@ -40,6 +40,10 @@ lessons:
         slug: waves-12-panorama-fr
         name: PANORAMA-12 : les ondes
         order: 3
+    -
+        slug: interdisciplinary-propagation-absorption-amplification-2
+        name: CROSS-2 : Propagation, absorption, amplification
+        order: 1
 ---
 
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