chore(deps): update pnpm to v8.15.7

Author: renovate[bot]

bun.lockb

@@ -2,7 +2,7 @@
   "name": "test-project",
   "description": "This is not used by the workflow, it's only used for testing",
   "version": "1.0.0",
-  "packageManager": "pnpm@8.7.6",
+  "packageManager": "pnpm@8.15.7",
   "engines": {
     "node": "18.17.1"
   },