Update README.md

Author: magefan

README.md

@@ -67,5 +67,6 @@ The code is licensed under [Open Software License ("OSL") v. 3.0](http://opensou
   * [Magento 2 Translation Extension](https://magefan.com/magento-2-translation-extension)
   * [Magento 2 WebP Optimized Images Extension](https://magefan.com/magento-2-webp-optimized-images)
   * [Magento 2 Image Optimization Extension](https://magefan.com/magento-2-image-optimization-extension)
+  * [Magento 2 Zendesk Chat Extension](https://magefan.com/magento-2-zendesk-chat-extension)
   * [Magento 2 Zero Downtime Deployment](https://magefan.com/blog/magento-2-zero-downtime-deployment)