chore(deps): update pnpm to v9.15.9

Author: renovate[bot]

package.json

@@ -71,7 +71,7 @@
     "turbo": "^2.0.5",
     "typescript": "5.8.2"
   },
-  "packageManager": "pnpm@9.6.0",
+  "packageManager": "pnpm@9.15.9",
   "publishConfig": {
     "access": "public",
     "registry": "https://registry.npmjs.org"