add rn version desc in introcuce doc
add rn version desc in introcuce doc

ddcat1115/ant-design-mobile,ant-design/ant-design-mobile,ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,bccsafe/ant-design-mobile,ant-design/ant-design-mobile,ant-design/ant-design-mobile,ant-design/ant-design-mobile,ddcat1115/ant-design-mobile,ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,bccsafe/ant-design-mobile,bccsafe/ant-design-mobile,ddcat1115/ant-design-mobile