🤖 Bump MdXaml from 1.6.0 to 1.9.0 (#3116)

Bumps [MdXaml](https://github.com/whistyun/MdXaml) from 1.6.0 to 1.9.0.
- [Release notes](https://github.com/whistyun/MdXaml/releases)
- [Commits](https://github.com/whistyun/MdXaml/compare/1.6.0...1.9.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Shadowsocks.WPF/Shadowsocks.WPF.csproj

@@ -50,7 +50,7 @@
 
   <ItemGroup>
     <PackageReference Include="MaterialDesignThemes" Version="3.2.0" />
-    <PackageReference Include="MdXaml" Version="1.7.0" />
+    <PackageReference Include="MdXaml" Version="1.9.0" />
     <PackageReference Include="OxyPlot.Wpf" Version="2.0.0" />
     <PackageReference Include="ReactiveUI.Events.WPF" Version="13.1.1" />
     <PackageReference Include="ReactiveUI.Fody" Version="13.0.38" />

shadowsocks-csharp/shadowsocks-csharp.csproj

@@ -37,7 +37,7 @@
     </PackageReference>
     <PackageReference Include="GlobalHotKeyCore" Version="1.2.0" />
     <PackageReference Include="Google.Protobuf" Version="3.15.2" />
-    <PackageReference Include="MdXaml" Version="1.6.0" />
+    <PackageReference Include="MdXaml" Version="1.9.0" />
     <PackageReference Include="Microsoft.VisualBasic" Version="10.3.0" />
     <PackageReference Include="NaCl.Core" Version="1.2.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />