Change listening on port regex to not include Unicode digits and to use culture invariance

Author: stephentoub

dotnet/src/Client.cs

@@ -1587,7 +1587,7 @@ private static LogLevel MapLevel(TraceEventType eventType)
     [JsonSerializable(typeof(UserInputResponse))]
     internal partial class ClientJsonContext : JsonSerializerContext;
 
-    [GeneratedRegex(@"listening on port (\d+)", RegexOptions.IgnoreCase, "en-US")]
+    [GeneratedRegex(@"listening on port ([0-9]+)", RegexOptions.IgnoreCase)]
     private static partial Regex ListeningOnPortRegex();
 }