update system.text.json and fix transitive package from datagrid

Author: LeftofZen

AvaGui/AvaGui.csproj

@@ -33,6 +33,7 @@
 
   <ItemGroup>
     <PackageReference Include="Avalonia" Version="11.1.1" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.1.1" />
     <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.1.1" />
     <PackageReference Include="Avalonia.Desktop" Version="11.1.1" />
     <PackageReference Include="Avalonia.Themes.Fluent" Version="11.1.1" />
@@ -46,6 +47,7 @@
     <PackageReference Include="NAudio" Version="2.2.1" />
     <PackageReference Include="ReactiveUI.Fody" Version="19.5.41" />
     <PackageReference Include="ReactiveUI.Validation" Version="4.0.9" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Zenith.Core" Version="1.0.20" />
   </ItemGroup>