bump ToolsetVersion to 2

Author: alexrp

Directory.Build.props

@@ -6,7 +6,7 @@
         <Authors>Zig Contributors, $(Company) Contributors</Authors>
         <Copyright>Copyright © $(Authors)</Copyright>
         <ZigVersion>0.16.0</ZigVersion>
-        <ToolsetVersion>1</ToolsetVersion>
+        <ToolsetVersion>2</ToolsetVersion>
         <Version>$(ZigVersion).$(ToolsetVersion)</Version>
     </PropertyGroup>