deps: pnpm 9.15.4 (#92)

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

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
     "esbuild": "~0.24.0",
     "skuba": "9.1.0"
   },
-  "packageManager": "pnpm@9.12.3",
+  "packageManager": "pnpm@9.15.4",
   "engines": {
     "node": ">=20.10"
   },