v2.2.1 — Shadow Strike rebalance + Vampire Leap sound revert

Small balance + UX patch on top of v2.2.0. No new features, no jar size change beyond a few bytes.

⚖️ Shadow Strike rebalance

The Gold-tier vampire teleport was too cheap to use. Now it has a real tradeoff:

	Before (v2.2.0)	After (v2.2.1)
Cooldown	15 s	40 s
Self-cost	none	3 hearts (player.damage(6.0))

Updated everywhere it's surfaced:

• In-game /vz test perk browser description
• Chorus-fruit item lore (red "Costs 3 ♥" line + yellow 40s cooldown)
• WIKI.md table row

🔊 Vampire Leap sound revert

v2.2.0's added playPortal() layered sound on Vampire Leap was too busy on top of the existing ENTITY_ENDER_DRAGON_FLAP. Removed the layered cue — only the dragon flap plays now. The new bloodSpray visual stays.

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Drop-in upgrade from v2.2.0 — same config, same data files, same arena setup. Just replace the jar.