ok you meant 1.15 since 1.16 has the nether update and updated the zombie pigman and your still gonna stick with 1.15 when the cave & cliff's update get released.

but 1.16 has the updated zombie pigman because 1.15 is the bees not the nether and 1.16 is the nether so they updated the old zombie pigman to a new one called zombified piglin.