chore(deps): update pnpm to v11.20.0

Author: renovate[bot]

package.json

@@ -2,7 +2,7 @@
   "name": "flow-pilot-action",
   "type": "module",
   "private": true,
-  "packageManager": "pnpm@11.15.1",
+  "packageManager": "pnpm@11.20.0",
   "description": "",
   "author": "tdesign",
   "license": "MIT",