Correct "using" statements

Author: Chris Martinez

src/Microsoft.AspNetCore.Mvc.Versioning/Versioning/ApiVersionActionSelector.cs

@@ -9,11 +9,11 @@
     using Infrastructure;
     using Internal;
     using System;
+    using System.Collections;
     using System.Collections.Generic;
     using System.Diagnostics.Contracts;
     using System.Linq;
     using static ErrorCodes;
-    using System.Collections;
 
     /// <summary>
     /// Represents the logic for selecting an API-versioned, action method.