fix: cabin chemist gives you bottles that actually exist

[chaosvolt]

Purpose of change

Fixes #4351

Describe the solution

Search-and-replace'd all hits of bottle_plastic_pill_prescription in NPC folder with bottle_plastic_small.

Describe alternatives you've considered

screm

Testing

1. Checked affected file for syntax and lint errors.
2. Also checked the rest of the container entries in that file, far as I can tell everything else uses containers already in the game.

Additional context

Checklist