made "Community" become submenu of "About"
made "Community" become submenu of "About"

lijasonvip/lijasonvip.github.io,ServiceComb/ServiceComb.github.io,lijasonvip/lijasonvip.github.io,ServiceComb/ServiceComb.github.io,ServiceComb/ServiceComb.github.io,lijasonvip/lijasonvip.github.io