Document link to snapshot site

Author: garydgregory

src/site/site.xml

@@ -36,7 +36,7 @@
         <menu name="Documentation">
             <item name="Building"                 href="/building.html"/>
             <item name="History"                  href="/changes-report.html"/>
-            <item name="2.0.0-M2" collapse="true" href="/index.html">
+            <item name="2.0.0-M2-SNAPSHOT" collapse="true" href="/index.html">
                 <item name="Release Notes"        href="https://dlcdn.apache.org//commons/beanutils/RELEASE-NOTES.txt"/>
                 <item name="User Guide"           href="https://commons.apache.org/proper/commons-beanutils/apidocs/org/apache/commons/beanutils2/package-summary.html"/>
                 <item name="API"                  href="https://commons.apache.org/proper/commons-beanutils/apidocs/index.html"/>