chore(deps): update pnpm to v11

Author: renovate[bot]

package.json

@@ -3,7 +3,7 @@
   "type": "module",
   "version": "0.0.0",
   "private": true,
-  "packageManager": "pnpm@10.34.1",
+  "packageManager": "pnpm@11.6.0",
   "description": "ESLint AST Explorer.",
   "keywords": [],
   "repository": "ntnyq/eslint-ast-explorer",