fix: correct stack_size of hickory nut ambrosia to make sense with recipe requirements

[chaosvolt]

Checklist

Required

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

Optional

Purpose of change

This fixes hickory nut ambrosia being about 4 times as dense as it's expected to be. A quick glance at the recipe showed that the issue was that charges divides its volume into 4.

The expected fix WOULD be to just divide weight by 4, but...it takes 10 charges of water in addition to nuts, sweetener,and milk while outputting 10 charges, so the ACTUAL answer is it clearly needs a stack size defined, derp.

Fixes #5114

Describe the solution

Added stack_size value of 1 to hickory nut ambrosia.

Describe alternatives you've considered

1. Screaming because I was this fucking close to going the "divide weight by 4" before I thought to actually check what the recipe implies.
2. Making the recipe less watered down. I dunno what the intended proportions are for this blursed nut pilk, since this is a drink I've never actually heard of before IRL to be honest.
3. Adding posca instead because that is a blursed drink I HAVE heard of IRL.

Testing

1. Checked affected file for syntax and lint errors.
2. Load-tested in compiled test build.
3. Examined recipe, it showed that it makes 2.5 liters of ambrosia per batch now, while weight remains unchanged.

Additional context