chore(deps): update pnpm to v12.8.1

Author: renovate[bot]

package.json

@@ -17,7 +17,7 @@
     "prettier": "3.9.9",
     "prettier-plugin-packagejson": "2.5.22"
   },
-  "packageManager": "pnpm@12.8.0",
+  "packageManager": "pnpm@12.8.1",
   "engines": {
     "node": "^22.11.0 || >=24.11.0",
     "pnpm": "^12.0.0"