The pumpkin on snow golems turns red when they take damage

Relates to MC-189840 and MC-224886. The pumpkin on snow golems turns red when they take damage, which is inconsistent with the behavior of pig and strider saddles. This may be intentional.

Steps to reproduce

1. Spawn a snow golem
2. Attack it

Observed result: The pumpkin turns red.

Expected result: The pumpkin should remain its original color unlike the rest of the model.