[pumpkinsweeper] fix readme
[pumpkinsweeper] fix readme

fabianwilliams/xamarin-forms-samples,conceptdev/xamarin-forms-samples,JakeShanley/xamarin-forms-samples,williamsrz/xamarin-forms-samples,fabianwilliams/xamarin-forms-samples,KiranKumarAlugonda/xamarin-forms-samples,biste5/xamarin-forms-samples-1,williamsrz/xamarin-forms-samples,biste5/xamarin-forms-samples-1,conceptdev/xamarin-forms-samples,teefresh/xamarin-forms-samples-1,pabloescribanoloza/xamarin-forms-samples-1,teefresh/xamarin-forms-samples-1,reverence12389/xamarin-forms-samples-1,pabloescribanoloza/xamarin-forms-samples-1,reverence12389/xamarin-forms-samples-1,JakeShanley/xamarin-forms-samples,KiranKumarAlugonda/xamarin-forms-samples