Update dependency openai to v6 (#12)

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

Author: renovate[bot]

package.json

@@ -45,7 +45,7 @@
     "dotenv": "^16.4.5",
     "fastify": "^5.0.0",
     "open": "^10.1.1",
-    "openai": "^5.0.0",
+    "openai": "^6.0.0",
     "pino": "^9.2.0",
     "yargs": "^18.0.0"
   },