Updated to Visual Studio Validation 16.8.33

This is a major update, but the library is exclusively used by Visual Studio and does not impact downstream implementors.

Author: JeremyCaney

OnTopic/OnTopic.csproj

@@ -48,7 +48,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="System.ComponentModel.Annotations" Version="4.7.0" />
-    <PackageReference Include="Microsoft.VisualStudio.Validation" Version="15.5.31">
+    <PackageReference Include="Microsoft.VisualStudio.Validation" Version="16.8.33">
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
   </ItemGroup>