Updated API from documentation release

Author: ct-sdks[bot]

api-specs/import/types/customer-import.raml

@@ -147,7 +147,7 @@ types:
         type: string
       password?:
         description: |
-          Maps to `Customer.password`. Required when `authenticationMode` is set to `Password`.
+          Maps to `Customer.password`. Required when `authenticationMode` is set to `Password`. This field is only used when creating new Customers, and is ignored when updating Customers. However, due to the Import API's [upsert behavior](/../import-export/overview#how-are-resources-created-or-updated), a non-empty value must still be provided when updating Customers.
         type: string
       stores?:
         description: |