pc 26.2: fix enchantment entity predicates in loginPacket.json

[DallasCarraher]

Summary

• Follow-up to Add Minecraft PC 26.2 data (protocol 776) #1298 addressing VasilisDragon's post-merge comment.
• In data/pc/26.2/loginPacket.json, renames the entity predicate key type to minecraft:entity_type for bane_of_arthropods, channeling, impaling, looting, power, punch and smite (9 lines).

Not covered

• lunge was also listed as rejected by vanilla 26.2's Enchantment.DIRECT_CODEC, but its predicates use type_specific/flags/vehicle rather than the plain type key, so I don't know what is wrong there and left it unchanged.
• The rename follows the description in the comment and has not been checked against vanilla's codec. @VasilisDragon could you confirm, and say what lunge needs? Regenerating the registry from 26.2 sources would also work.

Test plan

• test.js and audit_versions.js pass (915 passing)
• Validate all 43 enchantments against vanilla 26.2's codec

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