fix error when getting product thumbnails by url key

Author: vacla

packages/peregrine/lib/talons/OrderHistoryPage/orderRow.gql.js

@@ -11,7 +11,7 @@ export const GET_CONFIGURABLE_THUMBNAIL_SOURCE = gql`
 `;
 
 export const GET_PRODUCT_THUMBNAILS_BY_URL_KEY = gql`
-    query GetProductThumbnailsByURLKey($urlKeys: [String!]!) {
+    query GetProductThumbnailsByURLKey($urlKeys: [String]!) {
         products(filter: { url_key: { in: $urlKeys } }) {
             # eslint-disable-next-line @graphql-eslint/require-id-when-available
             items {