chore(deps): update pnpm to v11.21.0 (#11371)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -13,9 +13,9 @@
   "keywords": [],
   "author": "Biome Developers and Contributors",
   "license": "MIT OR Apache-2.0",
-  "packageManager": "pnpm@11.20.0",
+  "packageManager": "pnpm@11.21.0",
   "engines": {
-    "pnpm": "11.20.0",
+    "pnpm": "11.21.0",
     "node": ">=22.13"
   },
   "type": "module",