Update README.md

Author: acoumb

README.md

@@ -13,3 +13,6 @@ This repository houses open-source extensions, created for Umbraco Forms, that i
 ### Automation
 
 [Zapier](./src/Umbraco.Forms.Integrations.Automation.Zapier) - a dashboard interface that allows users to vizualize registered subscription hooks for their Umbraco Forms and to call Zapier triggers when a specific forms gets submitted
+
+### Commerce
+[emerchantpay](./src/Umbraco.Forms.Integrations.Automation.Zapier) - a custom workflow for handling online payments using a hosted payment page provided by emerchantpay.