chore(deps): update pnpm to v9.15.0 (#312)

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

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
     "url": "https://github.com/openscript/r.obin.ch/issues"
   },
   "repository": "github:openscript/r.obin.ch",
-  "packageManager": "pnpm@9.14.4",
+  "packageManager": "pnpm@9.15.0",
   "scripts": {
     "dev": "astro dev --host",
     "start": "astro dev --host",