refactor(WebSocket): 将TaskCompletionSource初始化语法改为显式构造

简化TaskCompletionSource的初始化语法，保持代码风格一致性

Author: AlianBlank

Runtime/Network/Network/WebSocket/NetworkManager.WebSocketNetSocket.cs

@@ -19,7 +19,7 @@ private sealed class WebSocketNetSocket : INetworkSocket
             /// </summary>
             private bool _isConnecting = false;
 
-            private TaskCompletionSource<bool> _connectTask = new(TaskCreationOptions.RunContinuationsAsynchronously);
+            private TaskCompletionSource<bool> _connectTask = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
             private readonly Action<byte[]> _onReceiveAction;
             private readonly Action<string, ushort> _onCloseAction;