Pistol Crossbow Recipe Skill Fix

Changed pistol crossbow recipe to use archery as secondary skill.
Didn't seem to make much sense that it required firearms skill and all
other bows required archery skill. Even if it's called a pistol crossbow
it's still a crossbow, not a pistol.   Unless there's some other reason
I'm not seeing in which case disregard this pull request.
Merge PR #1816