fix: remove stale agentos-skills-registry dep from wunderland package

Same issue as previous fix — this workspace:* dep points to a
non-existent workspace package, causing frozen-lockfile CI failures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: claude

packages/wunderland/package.json

@@ -139,8 +139,7 @@
     "uuid": "^9.0.0"
   },
   "optionalDependencies": {
-    "@framers/agentos-ext-skills": "workspace:*",
-    "@framers/agentos-skills-registry": "workspace:*"
+    "@framers/agentos-ext-skills": "workspace:*"
   },
   "devDependencies": {
     "@types/node": "^20.10.0",