Update README.md

Author: acoumb

README.md

@@ -22,5 +22,7 @@ This repository houses open-source extensions, created for Umbraco CMS, that int
 
 [Dynamics](./src/Umbraco.Cms.Integrations.Crm.Dynamics/) - a form picker and rendering component for Dynamics 365 Marketing forms.
 
+[ActiveCampaign](./src/Umbraco.Cms.Integrations.Crm.ActiveCampaign/) - a form picker and rendering component for ActiveCampaign forms.
+
 ### Automation
 [Zapier](./src/Umbraco.Cms.Integrations.Automation.Zapier/) - a dashboard interface allowing users to vizualize registered subscription hooks for content types and to call Zapier triggers when content gets published.