Fixed defaultValue for sharedViews setting
Fixed defaultValue for sharedViews setting

refs https://github.com/TryGhost/Ghost/issues/10318

- `shared_views` is always an array (Ghost-Admin has handling to revert it to an array if it's anything else) but it's default value was set to an empty object

e10/Ghost,ErisDS/Ghost,bitjson/Ghost,TryGhost/Ghost,janvt/Ghost,bitjson/Ghost,janvt/Ghost,ErisDS/Ghost,e10/Ghost,ErisDS/Ghost,JohnONolan/Ghost,JohnONolan/Ghost,JohnONolan/Ghost,TryGhost/Ghost,TryGhost/Ghost