Rename Goals to Plugin Documentation in the site menu

Author: slawekjaranowski

src/site/site.xml

@@ -25,7 +25,7 @@
 
     <menu name="Overview">
       <item name="Introduction" href="index.html" />
-      <item name="Goals" href="plugin-info.html" />
+      <item name="Plugin Documentation" href="plugin-info.html" />
       <item name="Usage" href="usage.html" />
     </menu>
   </body>