The slim model's arms are lowered by 0.5 pixels.

Steps to reproduce:

1. Equip any slim-armed skin (e. g. Alex)
2. Compare the player models from past versions or normal skin and 1.21.30

Observed result:
The slim model's arms are lowered by 0.5 pixels.

Expected result:
The slim model's arms are level at the shoulders and torso.