Fixes most mining mobs being unaffected by additional damage against them (#89682)

## About The Pull Request

#89619 introduced a MOB_MINING biotype which allows us to get rid of
jank that the ismining() macro was. This fixes soulscythes, cursed
katanas, mining bombs, strongarm implants and junk hunter bullets not
getting their buffs against a good chunk of mining fauna.

Closes #89597

## Why It's Good For The Game

You'd expect items explicitly designed against fauna to actually fare
well against it.

## Changelog
🆑
fix: Fixed most mining mobs being unaffected by additional damage
against them
/🆑

code/modules/mod/modules/modules_supply.dm

@@ -620,7 +620,7 @@
 	for(var/turf/closed/mineral/rock in circle_range_turfs(src, 2))
 		rock.gets_drilled()
 	for(var/mob/living/mob in range(1, src))
-		mob.apply_damage(damage * (ishostile(mob) ? fauna_boost : 1), BRUTE, spread_damage = TRUE)
+		mob.apply_damage(damage * (ismining(mob) ? fauna_boost : 1), BRUTE, spread_damage = TRUE)
 		if(!ishostile(mob) || !firer)
 			continue
 		var/mob/living/simple_animal/hostile/hostile_mob = mob