Certain farm animals are not spawned as their cold variant in some cold biomes due to an incomplete tag

As of 25w05a, cold variants of pigs and cows will not spawn in biomes which the player would expect them to spawn in.

Affected Biomes:
Snowy Plains, Frozen River, Frozen Ocean, Deep Frozen Ocean, Deep Cold Ocean, Snowy Beach, Jagged Peaks, Frozen Peaks, Grove, Snowy Slopes, Ice Spikes, The End, End Barrens, End Highlands, End Midlands and Small End Islands

Steps to reproduce:
1. Go into a snowy plains
2. Give yourself a pig spawn egg
3. Rightclick the ground

Observed behavior:
The pig that is spawned is a temperate pig.

Expected behavior:
The pig should be a cold pig, as the biome it got spawned in is cold.