chore(devdeps): update pnpm to v8.15.6 (#1908)

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

Author: renovate[bot]

package.json

@@ -5,7 +5,7 @@
     "packages/*"
   ],
   "type": "module",
-  "packageManager": "[email protected].5",
+  "packageManager": "[email protected].6",
   "engines": {
     "node": ">=20.x",
     "pnpm": ">=8.x"