Update NuGet packages

DiscordChatExporter.Gui/DiscordChatExporter.Gui.csproj

@@ -14,8 +14,8 @@
 
   <ItemGroup>
     <PackageReference Include="Gress" Version="1.2.0" />
-    <PackageReference Include="MaterialDesignColors" Version="2.0.3" />
+    <PackageReference Include="MaterialDesignColors" Version="2.0.4" />
-    <PackageReference Include="MaterialDesignThemes" Version="4.2.1" />
+    <PackageReference Include="MaterialDesignThemes" Version="4.3.0" />
     <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.39" />
     <PackageReference Include="Ookii.Dialogs.Wpf" Version="5.0.0" />
     <PackageReference Include="Onova" Version="2.6.2" />