Update pnpm to v8.15.8

Author: renovate[bot]

package.json

@@ -76,7 +76,7 @@
     "@typescript-nameof/types": "^0.0.7",
     "vite": "^2.0.0 || ^3.0.0 || ^4.0.0 || ^5.0.0"
   },
-  "packageManager": "pnpm@8.15.4",
+  "packageManager": "pnpm@8.15.8",
   "engines": {
     "node": "^16.13.0 || >=18.0.0",
     "npm": ">=7.0.0",