luci-mod-status: fix description for luci-mod-status-channel_analysis

Update "modules/luci-mod-status/root/usr/share/rpcd/acl.d/luci-mod-status.json".
Fix incorrect description for "luci-mod-status-channel_analysis".

Signed-off-by: Vladislav Grigoryev <vg.aetera@gmail.com>