fix: 修复文件过大导致无法上传问题

Author: ArgoZhang

src/components/BootstrapBlazor.CherryMarkdown/Components/CherryMarkdown/CherryMarkdown.razor.cs

@@ -121,15 +121,15 @@ protected override async Task OnAfterRenderAsync(bool firstRender)
     /// </summary>
     /// <param name="uploadFile"></param>
     [JSInvokable]
-    public async Task<string> Upload(CherryMarkdownUploadFile uploadFile)
+    public async Task<string> Upload(CherryMarkdownUploadFile uploadFile, CancellationToken token = default)
     {
         var ret = "";
         if (Module != null)
         {
             var stream = await InvokeAsync<IJSStreamReference>("fetch", Id);
             if (stream != null)
             {
-                using var data = await stream.OpenReadStreamAsync();
+                using var data = await stream.OpenReadStreamAsync(stream.Length, token);
                 uploadFile.UploadStream = data;
                 if (OnFileUpload != null)
                 {