Update demos/variables.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: yamilbknsu

demos/variables.py

@@ -249,7 +249,7 @@ def agebin4(persons):
     return p.gt(60) * 1
 
 
-################### addedd for updated
+################### added for updated
 
 
 @orca.column("persons")