处理格式验证问题

src/FileStorage/DefaultFileStorage.cs

@@ -252,7 +252,7 @@ public class DefaultFileStorage : IFileStorage, IScopeDependency
             extList.Add("wps");
 
             //extList.Add("m4a");
-            if (!extList.Contains(ext))
+            if (!extList.Contains(ext.ToLower()))
             {
                 // throw UserFriendlyException.SameMessage("文件格式不正确，只能上传【doc,rar,jpg,pdf,mp3,xls,xlsx,zip,docx,wmv,mp4.png,svg,avijpeg.m4a.txt】格式文件");
                 throw UserFriendlyException.SameMessage("文件格式不正确，只能上传【doc,rar,jpg,pdf,mp3,xls,xlsx,zip,docx,wmv,mp4,png,svg,avi,jpeg,m4a,txt,wps】格式文件");