metadata-pull-hook: fix limb expression in on-pull-nack
:_ this
%+ turn ~(tap by associations)
|= [=md-resource:metadata =association:metadata]
- %+ poke-our:pass:io %metadata-store
+ %+ poke-our:pass:io:hc %metadata-store
:- %metadata-update-2
!> ^- update:metadata
[%remove resource md-resource]
