Update readme example to reflect defaults

Changed sanitize default from true to false in the example.

Author: ozziexsh

README.md

@@ -31,7 +31,7 @@ marked.setOptions({
   tables: true,
   breaks: false,
   pedantic: false,
-  sanitize: true,
+  sanitize: false,
   smartLists: true,
   smartypants: false
 });