# What Type of Bauble is the Heart Amulet?
# Valid values:
# AMULET
# RING
# BELT
# TRINKET
# HEAD
# BODY
# CHARM
S:heartCanisterBaubleType=TRINKET

In game it is still (AMULET) type. I threw it away, re-launched and nothing changed when I made a new amulet.

baubley-heart-canisters-1.12.2-2.0.3.jar