repair BingTranslator !!!

[momj-00]

Core modification code ：

namespace Translate.Core.Translator.Bing
{
    public class BingTranslator : ITranslator
    {
        //Line  253
         var request = new HttpRequestMessage(HttpMethod.Post, $"https://cn.bing.com/ttranslatev3?isVertical=1&&IG={_ig}&IID={_iid}");
         //Line  276
         private readonly Regex  _iidRegex = new Regex(@"<div\s+id=[""']tta_outGDCont[""']\s+data-iid=[""'](.*?)[""']");
        
         //Line  290
          var html = new HttpHelper().GetHtml(new HttpItem()
            {
                Url = "https://cn.bing.com/translator",
                Timeout = 5000
            }).Html;
    }
}

Unit test passed!