[Anon] Black Dwarfs (1c): Black Dwarves Hero starting experience

**Problem:**
Black Dwarves Hero starting experience

**Expected:**
Bull Centaur starts with 20xp. It is meant to be 10.
Gaolers start with 20xp. It is meant to be 8.

The system displays an error if I attempt to change it.

**Additional Info:**
https://mordheimer.net/docs/warbands/grade-1c-warbands/black-dwarfs

**List:** https://www.newrecruit.eu/app/list/blUE8
**NewRecruit Version:** 32.51

Use the Black Dwarfs Hero starting experience details and the linked Mordheim documentation as the specification. Find the warband data for Bull Centaur and Gaolers, verify their starting experience values, and reproduce the reported validation error in NewRecruit. Done means the entries accept Bull Centaur at 10 XP and Gaolers at 8 XP.

Written by the indexing model from the issue text.