MAGETWO-31354: Magento Version Tag shows in RSS Feed

- RSS feed URL has been changed

Author: Maksym Savich

app/code/Magento/AdminNotification/etc/config.xml

@@ -9,7 +9,7 @@
     <default>
         <system>
             <adminnotification>
-                <feed_url>notifications.magentocommerce.com/community/notifications.rss</feed_url>
+                <feed_url>notifications.magentocommerce.com/magento2/community/notifications.rss</feed_url>
                 <popup_url>widgets.magentocommerce.com/notificationPopup</popup_url>
                 <severity_icons_url>widgets.magentocommerce.com/%s/%s.gif</severity_icons_url>
                 <use_https>0</use_https>