chore(deps): update pnpm to v9.15.0 (#778)

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

package.json

@@ -3,7 +3,7 @@
   "author": "Shuntaro Nishizawa <[email protected]> (https://github.com/shun-shobon)",
   "license": "MIT",
   "private": true,
-  "packageManager": "pnpm@9.14.4",
+  "packageManager": "pnpm@9.15.0",
   "scripts": {
     "dev": "vite",
     "build": "vite build",