make not found generic

Author: bengreenbank

specs/advanced-personalization/common/responses/UserNotFound.yml renamed to specs/advanced-personalization/common/responses/GenericNotFound.yml

@@ -1,4 +1,4 @@
-description: User not found.
+description: Not found.
 content:
   application/json:
     schema:

specs/advanced-personalization/paths/user.yml

@@ -22,7 +22,7 @@ get:
     '401':
       $ref: '../common/responses/Unauthorized.yml'
     '404':
-      $ref: '../common/responses/UserNotFound.yml'
+      $ref: '../common/responses/GenericNotFound.yml'
     '422':
       $ref: '../common/responses/InvalidUserID.yml'
     '500':