Fix escaped XML characters (#8565)

Fixes #7776

Author: Kissaki

snippets/csharp/System.Xml/XmlElement/InnerText/source.cs

@@ -36,6 +36,6 @@ public static void Main() {
 // some textmore text
 // Display the InnerXml of the element...
 // some text<child />more text
-// <elem>Text containing &lt;markup/&gt; will have char(&lt;) and char(&gt;) escaped.</elem>
+// <elem>Text containing &amp;lt;markup/&amp;gt; will have char(&amp;lt;) and char(&amp;gt;) escaped.</elem>
 // <elem>Text containing <markup />.</elem>
 // </Snippet1>