Rearrange using directives

Author: justinyoo

test/AzureOpenAIProxy.AppHost.Tests/ApiApp/Endpoints/AdminGetEventDetailsOpenApiTests.cs

@@ -1,11 +1,11 @@
 using System.Text.Json;
 
+using AzureOpenAIProxy.AppHost.Tests.Fixtures;
+
 using FluentAssertions;
 
 using IdentityModel.Client;
 
-using AzureOpenAIProxy.AppHost.Tests.Fixtures;
-
 namespace AzureOpenAIProxy.AppHost.Tests.ApiApp.Endpoints;
 
 public class AdminGetEventDetailsOpenApiTests(AspireAppHostFixture host) : IClassFixture<AspireAppHostFixture>