Sign windows nugets instead of mac (#665)

* Sign windows nugets

* - change destination folder

* - switch

eng/pipelines/handlers.yml

@@ -90,14 +90,14 @@ parameters:
         vmImage: windows-latest
         bootsAndroid: $(Android.Msi)
         bootsiOS: $(iOS.Msi)
-        artifact: nuget-windows
+        artifact: nuget
       - name: macos
         poolName: 'Azure Pipelines'
         vmImage: macos-latest
         bootsAndroid: $(Android.Pkg)
         bootsiOS: $(iOS.Pkg)
         bootsMacCatalyst: $(MacCatalyst.Pkg)
-        artifact: nuget
+        artifact: nuget-macos
 
 resources:
   repositories: