fix(kvb-git-branch-cleanup): trim description to fit the listing budget

The replayed pkgmgr wrapper skills put the description listing at 1501 of 1500 words; one word less brings it back to 1500.

🎯 Fix: 95 %
💥 Break: 1 %
💸 Cost: 100 %
⏱️ Time: 100 %
🛡️ Security: 100 %
🏆 Score: 94
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/kvb-git-branch-cleanup/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: kvb-git-branch-cleanup
 description: >
-  Remove merged branches no worktree holds.
+  Remove merged branches outside worktrees.
 ---
 
 `pkgmgr branch cleanup` decides what is merged and does the removing; this