Java 26.3 data: 1.8 dropped item metadata key

Built from the tested support/java-26.3 wrapper (e1a7d00) and its pinned data submodule (minecraft-data 6c096ad). Adds to data-9: metadataIxOfItem is 10 on 1.8 (1.8.8 servers register and send a dropped item's stack at entity metadata key 10; it was 8, so getDroppedItem threw on 1.8). No other data changed.

SHA-256: 70008925d6c09173c2af4dfed23eaa7d9cbf12a30a2824c26b3870973c57c910
npm integrity: sha512-2ARSscHpQbLo1XEHKft5S4hbrCi/+DeJ7WRKNQNmmfwcknq6zwkJHnjvQ7no5ROgfBLY23bcTbun65pmwz37PQ==