🐛 Fixed "Cannot destructure property" error when overwriting active theme
🐛 Fixed "Cannot destructure property" error when overwriting active theme

refs https://github.com/TryGhost/action-deploy-theme/issues/45

- added missing `throw error` in the `setFromZip()` catch which was hiding the underlying error when a theme uploaded and saved successfully but other code had failed
- fixed incorrect method name `activator.activateFromOverride` -> `activator.activateFromAPIOverride`

TryGhost/Ghost,ErisDS/Ghost,janvt/Ghost,e10/Ghost,TryGhost/Ghost,e10/Ghost,janvt/Ghost,ErisDS/Ghost,ErisDS/Ghost,TryGhost/Ghost