Update 'Monaco.Editor' component

Update 'Monaco.Editor' package reference to 0.8.1

Author: Nirmal4G

Microsoft.Toolkit.Uwp.SampleApp/Microsoft.Toolkit.Uwp.SampleApp.csproj

@@ -114,7 +114,7 @@
       <Version>2.6.2</Version>
     </PackageReference>
     <PackageReference Include="Monaco.Editor">
-      <Version>0.7.0-alpha</Version>
+      <Version>0.8.1-alpha</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Xaml.Behaviors.Uwp.Managed">
       <Version>2.0.1</Version>