Commit 2e73d7b changed the Hell Bovine art token from CW to EC
(MonStats.txt hellbovine, Code EC) but never added EC to the act 1 list
of ACT_MONSTER_SPECS, so pack-entity-assets baked no ec-hth atlas and the
Moo Moo Farm's (level 39) Hell Bovines had no art.
- ACT_MONSTER_SPECS[1]: add { token: "EC", weapon: "hth" }.
- Re-baked entities: 70 monster atlases (was 69). entities/index.json is
now sha256 675757cf...; the new ec-hth entry is its only change.
- Tests: pin 70 entities, 66 unique specs and the new index hash.
TAG=agy
CONV=a4f9163c-a011-4161-b169-7f361b1ed57e
troytt