docs: update readme

Author: tusbar

README.md

@@ -40,6 +40,7 @@ ls clients | sed 's$\(.*\)$- [\1](https://www.github.com/bizon/selling-partner-a
 
 - [amazon-warehousing-and-distribution-2024-05-09](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/amazon-warehousing-and-distribution-2024-05-09)
 - [aplus-content-api-2020-11-01](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/aplus-content-api-2020-11-01)
+- [application-integrations-api-2024-04-01](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/application-integrations-api-2024-04-01)
 - [application-management-api-2023-11-30](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/application-management-api-2023-11-30)
 - [catalog-items-api-2020-12-01](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/catalog-items-api-2020-12-01)
 - [catalog-items-api-2022-04-01](https://www.github.com/bizon/selling-partner-api-sdk/tree/master/clients/catalog-items-api-2022-04-01)