Update Emby.Server.Implementations/ApplicationHost.cs

Co-Authored-By: Phlogi <Phlogi@users.noreply.github.com>

Emby.Server.Implementations/ApplicationHost.cs

@@ -1372,7 +1372,7 @@ namespace Emby.Server.Implementations
         public async Task<SystemInfo> GetSystemInfo(CancellationToken cancellationToken)
         {
             var localAddress = await GetLocalApiUrl(cancellationToken).ConfigureAwait(false);
-            var wanAddress = System.String.Empty;
+            var wanAddress = string.Empty;
             
             if (string.IsNullOrEmpty(ServerConfigurationManager.Configuration.WanDdns)){
                 wanAddress = await GetWanApiUrl(cancellationToken).ConfigureAwait(false);