chore(deps): update pnpm to v9.15.9

Author: renovate[bot]

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Install dependencies
         uses: pnpm/action-setup@v2
         with:
-          version: 9.9.0
+          version: 9.15.9
           run_install: |
             - recursive: true
               args: [--frozen-lockfile, --strict-peer-dependencies]

package.json

@@ -4,7 +4,7 @@
   "version": "0.0.3",
   "description": "stainless api monorepo",
   "author": "[email protected]",
-  "packageManager": "pnpm@9.9.0",
+  "packageManager": "pnpm@9.15.9",
   "repository": {
     "type": "git",
     "url": "https://github.com/stainless-api/stl-api.git"