Fix a markdown table rendering bug (#87)

Author: mumian

src/TemplateRefGenerator/Utils/MarkdownUtils.cs

@@ -21,7 +21,8 @@ public static string Escape(string input) => input
         .Replace("<", "&lt;")
         .Replace(">", "&gt;")
         .Replace("\r", "")
-        .Replace("\n", "<br />");
+        .Replace("\n", "<br />")
+        .Replace("|", "\\|");
 
     public static string ConvertDocsLinks(string input) => input
         // Remove hostname and /en-us/ prefix so that links under the same domain are relative