Update Avalonia.Browser package version reference

The `Avalonia.Browser` package reference in the `CodeBreaker.Avalonia.Browser.csproj` file has been updated. The hardcoded version `11.0.9` has been replaced with a variable `$(AvaloniaVersion)`.

Author: szv

src/CodeBreaker.Avalonia/CodeBreaker.Avalonia.Browser/CodeBreaker.Avalonia.Browser.csproj

@@ -12,7 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia.Browser" Version="11.0.9" />
+    <PackageReference Include="Avalonia.Browser" Version="$(AvaloniaVersion)" />
   </ItemGroup>
 
   <ItemGroup>