35052: Updated childAgeThreshold description based on the upcoming changes (#239)

* Updated childAgeThreshold description based on the upcoming changes

* Update common.yml

* Update common.yml

Author: vyakimchik

common.yml

@@ -282,7 +282,7 @@ components:
         childAgeThreshold:
           type: integer
           example: 13
-          description: "Minimum age of a child, at which portrait comparison result will be effective. Default: 13."
+          description: "The age threshold for the portrait comparison. Default: 13."
         childDocValidityYears:
           type: integer
           example: 5