resolved: MarkdownDocumentToHtmlConverter miscatches the links

resolved https://github.com/abpframework/abp/issues/2582

modules/docs/src/Volo.Docs.Web/Markdown/MarkdownDocumentToHtmlConverter.cs

@@ -24,7 +24,7 @@ namespace Volo.Docs.Markdown
         }
 
         private const string MdLinkFormat = "[{0}]({1}{2}/{3}/{4}{5}/{6})";
-        private const string MarkdownLinkRegExp = @"\[(.*?)\]\((.*?\.md)\)";
+        private const string MarkdownLinkRegExp = @"\[(.*?)\]\((.*?)\)";
         private const string AnchorLinkRegExp = @"<a[^>]+href=\""(.*?)\""[^>]*>(.*)?</a>";
          
         public virtual string Convert(ProjectDto project, DocumentWithDetailsDto document, string version,
@@ -56,7 +56,7 @@ namespace Volo.Docs.Markdown
             var normalized = Regex.Replace(content, MarkdownLinkRegExp, delegate (Match match)
             {
                 var link = match.Groups[2].Value;
-                if (UrlHelper.IsExternalLink(link))
+                if (UrlHelper.IsExternalLink(link) || !link.EndsWith(".md"))
                 {
                     return match.Value;
                 }