46039 Review, test and release update for Zapier (CMS)

- Update Zapier reference to CMS 15
- update client package to backoffice 15

Author: dtng95

src/Umbraco.Cms.Integrations.Automation.Zapier/Client/config.outputPath.js

@@ -1 +1 @@
-export const outputPath = 'Debug' !== 'Release' ? '../wwwroot' : '../obj/Debug/net8.0/clientassets'
+export const outputPath = 'Debug' !== 'Release' ? '../wwwroot' : '../obj/Debug/net9.0/clientassets'