Piglin banner pattern naming is incorrect

The bug

Minecraft 20w15a added a new banner pattern - Piglin.

Since there is already - among others - "Creeper Charge" and "Skull Charge", I think this item.minecraft.piglin_banner_pattern.desc should also be named "Piglin Charge".

Also, the in-banner phrases are missing for English, e.g. block.minecraft.banner.piglin.green should be "Green Piglin Charge".