chore(deps): update pnpm to v8.15.6

Author: renovate[bot]

package.json

@@ -2,7 +2,7 @@
   "name": "@coderwyd/eslint-config",
   "type": "module",
   "version": "2.3.2",
-  "packageManager": "[email protected].5",
+  "packageManager": "[email protected].6",
   "description": "Donny's ESLint config",
   "author": "Donny Wang <[email protected]> (https://github.com/coderwyd/)",
   "license": "MIT",