monitor: Fix unpacking key names.
Changed the key of some unpacking metrics a while ago (MRs !1648 (merged) and !1655 (merged)).
Grafana was never adjusted, so this MR restores the old names.
Changed the key of some unpacking metrics a while ago (MRs !1648 (merged) and !1655 (merged)).
Grafana was never adjusted, so this MR restores the old names.