Some block tags pluralize "replaceable" and some don't

List of those that do:

• deepslate_ore_replaceables

• nether_carver_replaceables

• overworld_carver_replaceables

• stone_ore_replaceables

Those that don't:

• ancient_city_replaceable

• azalea_root_replaceable

• lush_ground_replaceable

• moss_replaceable

• sculk_replaceable

• sculk_replaceable_worldgen

Noteworthy:

• dripstone_replaceable_blocks

Although replaceble can be both a noun (in which case it should be plural to be consistent with other tags) and an adjective (in which case it shouldn't be plural because adjectives don't have plurals) I think being consistent is important.

`dripstone_replaceable_blocks` is also a bit of a weird exception.