Update src/guides/v2.4/graphql/mutations/update-customer.md

Co-authored-by: Margaret Eker <meker@adobe.com>

Author: keharper

src/guides/v2.4/graphql/mutations/update-customer.md

@@ -72,7 +72,7 @@ Error | Description
 `"input" value should be specified` | The `input` argument is empty.
 `"Email" is not a valid email address.` | The value provided in the `input`.`email` argument has an invalid format.
 `Provide the current "password" to change "email".` | To change an email address, specify the correct customer password in the `password` argument.
-`A customer with the same email address already exists in an associated website.` | You cannot set a new email to a current customer, because another user has the same email address.
+`A customer with the same email address already exists in an associated website.` | You cannot apply a new email address to a current customer because another user has the same email address.
 `Invalid login or password.` | The value specified in the `password` argument is incorrect.
 `The current customer isn't authorized.` | The current customer is not currently logged in, or the customer's token does not exist in the `oauth_token` table.