Update VillagerUtil.java

[BrekiTomasson]

Fixes crash when generating names as the random number generated can otherwise be out of bounds.

[OverlordsIII]

Thanks for PR-ing!

[BrekiTomasson]

You think you can build & release the fix for the v1.18 version as well?

[Fourmisain]

Breki, I'm fairly certain you were lamenting a "bound must be positive" error, not an out of bounds error.
nextInt already excludes the bound so out of bounds is impossible here (and this change will drop one of the names).

The "bound must be positive" error is instead caused when the bound is <= 0.
Why that happens, I'm not yet sure, maybe the mod loaded an empty names list or there's some config init issue or something like that? Haven't looking into it yet.

Either way, this change should be reverted.