chore(deps): update pnpm to v9.15.6 (#50)

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

Author: renovate[bot]

package.json

@@ -2,7 +2,7 @@
   "name": "branches",
   "type": "module",
   "version": "0.0.1",
-  "packageManager": "pnpm@9.15.5",
+  "packageManager": "pnpm@9.15.6",
   "scripts": {
     "dev": "astro dev",
     "start": "astro dev",