Java 26.3 data: potion components without a custom name before 1.21.2

Built from the tested support/java-26.3 wrapper (a2b3bd3) and its pinned data submodule (minecraft-data c594f65). Adds to data-11: potion_contents in 1.20.5 to 1.21.1 has no custom name (PotionContents gained custom_name in 1.21.2), so potion items, such as a water bottle caught while fishing, decode again on 1.20.5, 1.20.6, 1.21 and 1.21.1. No other data changed.

SHA-256: f3b50a03f1fb634197d160269a5a8dcd8508615829b66518b83eba0b9ec7fbd0
npm integrity: sha512-3Z5D/W6wrqobMzXAeMiV+kPtYtg8q7+wgC5L48YGDbdtp2eNtj++7TnILZu/COg6EaOPMMR3AxGNEsi4Bbs5VQ==