Update Simplify.Web requirement from 4.5.* to 4.6.*

Updates the requirements on [Simplify.Web](https://github.com/SimplifyNet/Simplify.Web) to permit the latest version.
- [Release notes](https://github.com/SimplifyNet/Simplify.Web/releases)
- [Commits](SimplifyNet/Simplify.Web@4.5...4.6)

---
updated-dependencies:
- dependency-name: Simplify.Web
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Simplify.Web.MessageBox/Simplify.Web.MessageBox.csproj

@@ -31,7 +31,7 @@
 		<Content Include="Templates\App_Packages\Simplify.Web.MessageBox\OkMessageBox.tpl" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="Simplify.Web" Version="4.5.*" />
+		<PackageReference Include="Simplify.Web" Version="4.6.*" />
 	</ItemGroup>
 	<ItemGroup>
 		<None Include="..\..\images\icon.png" Pack="true" Visible="false" PackagePath="" />