Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -173,7 +173,7 @@ $$
 
 <br>
 
-### [Solution Steps():
+### [Solution Steps]():
 
 
 1. Express the cherry chocolate constraint: