chore(deps): update pnpm to v8.15.5 (#6027)

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

Author: renovate[bot]

package.json

@@ -155,6 +155,6 @@
   "optionalDependencies": {
     "node-notifier": "^10.0.0"
   },
-  "packageManager": "pnpm@8.15.4",
+  "packageManager": "pnpm@8.15.5",
   "isSanityMonorepo": true
 }