Summary

SUMMARY: Balance "Set armored gauntlets and boots to be steel/leather, to be plate-tier instead of iron-tier"

Purpose of change

So, one thing I derped and forgot about while working on #3168 is that, for some reason, armored gauntlets and boots take plate-tier levels of fabrication to make, and have higher encumbrance than iron-tier stuff, but only provide iron-tier protection.

Also I suppose a much-belated followup to #847 which also did a lot of making armor items within a set have consistent armor values for its individual pieces.

Describe the solution

1. Changed material of armored gauntlets from iron/leather to steel/leather, making its protection go from 12/12/10 (iron tier) to 16/16/14 (plate tier).
2. Changed material of armored boots from iron/leather to steel/leather, making its protection go from 12/12/10 (iron tier) to 16/16/14 (plate tier).

Describe alternatives you've considered

Not screaming at how balance is always so damn hard.

Testing

1. Checked affected files for syntax and lint errors.
2. Ported changes to my laptop save to confirm the numbers match what plate armor and barbutes have.

Additional context