[MNGSITE-529] Rename "Goals" to "Plugin Documentation"

diff --git a/src/site/site.xml b/src/site/site.xml
index 64047f2..0bd0754 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -25,7 +25,7 @@
   <body>
     <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"/> -->
       <!-- <item name="FAQ" href="faq.html"/> -->
       <!-- According to https://issues.apache.org/jira/browse/MNGSITE-152 -->