build(deps): bump openai from 1.109.1 to 2.1.0

Bumps [openai](https://github.com/openai/openai-python) from 1.109.1 to 2.1.0.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v1.109.1...v2.1.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
     "gitpython==3.1.45",
     "pandas==2.3.3",
     "matplotlib==3.10.6",
-    "openai==1.109.1",
+    "openai==2.1.0",
     "discord.py==2.6.3",
     "misskey.py==4.1.0",
     "websockets==15.0.1",