Bump openai from 4.20.1 to 4.78.0

Bumps [openai](https://github.com/openai/openai-node) from 4.20.1 to 4.78.0.
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/openai/openai-node/compare/v4.20.1...v4.78.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -15,7 +15,7 @@
     "@actions/core": "^1.10.0",
     "@octokit/rest": "^21.0.2",
     "minimatch": "^7.4.2",
-    "openai": "^4.20.1",
+    "openai": "^4.78.0",
     "parse-diff": "^0.11.1",
     "ts-node": "^10.9.2"
   },