fix: update ProductVersion in Directory.Build.props

The ProductVersion property in the Directory.Build.props file has been updated from 0.1.6 to 1.0.1. This reflects the new stable version release of the product.

src/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <Nullable>enable</Nullable>
-    <ProductVersion>0.1.6</ProductVersion>
+    <ProductVersion>1.0.1</ProductVersion>
     <AvaloniaVersion>11.0.6</AvaloniaVersion>
     <MaterialIconsAvaloniaVersion>2.0.1</MaterialIconsAvaloniaVersion>
     <FluentAvaloniaUIVersion>2.0.0</FluentAvaloniaUIVersion>