chore(deps): update dependency materialdesignthemes to v4.9.0 (#158)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

src/Camelotia.Presentation.Wpf/Camelotia.Presentation.Wpf.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="MahApps.Metro" Version="2.4.9" />
     <PackageReference Include="MaterialDesignColors" Version="2.0.6" />
-    <PackageReference Include="MaterialDesignThemes" Version="4.5.0" />
+    <PackageReference Include="MaterialDesignThemes" Version="4.9.0" />
     <PackageReference Include="MaterialDesignThemes.MahApps" Version="0.2.2" />
     <PackageReference Include="ReactiveUI.WPF" Version="18.3.1" />
     <PackageReference Include="ReactiveMarbles.ObservableEvents.SourceGenerator" Version="1.1.4" PrivateAssets="all" />