feat(balance): wrist and ankle sheaths can fit pocket knives

[chaosvolt]

Purpose of change

Pocket knives have the SHEATH_KNIFE flag, but no actual sheath can fit them because back when I sanity-checked the min volume of small sheathes I only had scalpels in mind, and pocket knives are 5 ml smaller.

Describe the solution

1. Lowered min_volume of wrist sheath from 15 ml to 10 ml.
2. Lowered min_volume of ankle sheath from 15 ml to 10 ml.

Describe alternatives you've considered

1. Making pocket knives bigger.
2. Lowering min volume for these items all the way down to 1 ml just to make 100% sure this can never happen again.

Testing

Checked that there no longer any vanilla SHEATH_KNIFE items below the new volume limit.

Additional context

Another one spotted by Ekarus. :3

Checklist

Mandatory

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax like closes #1234 in Summary of the PR so it can be closed automatically.
• I've committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

[scarf005]

why do we need min_volume anyways?

[chaosvolt]

why do we need min_volume anyways?

Do not tempt me...