minor theme demo update

Author: pgfearo

sample/theme-demo.xsl

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE example [
- <!ENTITY company "Microsoft">
+ <!ENTITY company "Unknown">
 ]>
 
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"