luci-base: fix Russian translation
luci-base: fix Russian translation

More correct translation of the 'instance'.

Signed-off-by: Anton Kikin <5a0472fdb9489ec6419a1f506715354ce224b5a7@tano-systems.com>

rogerpueyo/luci,hnyman/luci,artynet/luci,openwrt/luci,kuoruan/luci,kuoruan/luci,wongsyrone/luci-1,artynet/luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,wongsyrone/luci-1,wongsyrone/luci-1,kuoruan/lede-luci,kuoruan/lede-luci,kuoruan/luci,openwrt/luci,kuoruan/luci,nmav/luci,artynet/luci,nmav/luci,kuoruan/lede-luci,openwrt/luci,lbthomsen/openwrt-luci,lbthomsen/openwrt-luci,hnyman/luci,rogerpueyo/luci,Noltari/luci,Noltari/luci,openwrt/luci,wongsyrone/luci-1,Noltari/luci,rogerpueyo/luci,Noltari/luci,Noltari/luci,artynet/luci,kuoruan/luci,lbthomsen/openwrt-luci,tobiaswaldvogel/luci,artynet/luci,kuoruan/lede-luci,chris5560/openwrt-luci,nmav/luci,kuoruan/luci,openwrt/luci,nmav/luci,tobiaswaldvogel/luci,openwrt-es/openwrt-luci,rogerpueyo/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,chris5560/openwrt-luci,tobiaswaldvogel/luci,openwrt-es/openwrt-luci,artynet/luci,kuoruan/luci,chris5560/openwrt-luci,hnyman/luci,wongsyrone/luci-1,kuoruan/lede-luci,hnyman/luci,artynet/luci,hnyman/luci,wongsyrone/luci-1,chris5560/openwrt-luci,openwrt-es/openwrt-luci,tobiaswaldvogel/luci,openwrt/luci,kuoruan/luci,lbthomsen/openwrt-luci,wongsyrone/luci-1,Noltari/luci,chris5560/openwrt-luci,tobiaswaldvogel/luci,openwrt-es/openwrt-luci,nmav/luci,rogerpueyo/luci,openwrt/luci,tobiaswaldvogel/luci,Noltari/luci,artynet/luci,kuoruan/lede-luci,nmav/luci,nmav/luci,openwrt-es/openwrt-luci,rogerpueyo/luci,hnyman/luci,Noltari/luci,tobiaswaldvogel/luci,lbthomsen/openwrt-luci,chris5560/openwrt-luci,openwrt/luci,chris5560/openwrt-luci,tobiaswaldvogel/luci,lbthomsen/openwrt-luci,Noltari/luci,wongsyrone/luci-1,openwrt-es/openwrt-luci,hnyman/luci,rogerpueyo/luci,nmav/luci,nmav/luci,artynet/luci,kuoruan/lede-luci,hnyman/luci,chris5560/openwrt-luci,lbthomsen/openwrt-luci,rogerpueyo/luci