[2.1.12] Fix description of RecipeCategory linking to RecipePrototype::category, which was removed+replaced

[TacticalMook]

lua-api.factorio.com/latest/prototypes/RecipeCategory.html
Description field:

RecipeCategory 'recipe-category'

A recipe category. The built-in categories can be found here. See RecipePrototype::category. Recipe categories can be used to specify which machine can craft which recipes.

The URL I struck-through no longer exists. It should be replaced with RecipePrototype::categories

[Bilka]

Thanks for the note, fixed for the next doc release.