build(deps): bump python-dotenv from 1.1.1 to 1.2.1

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -6,4 +6,4 @@ openai
 
 pytest
 ruff==0.14.0
-python-dotenv==1.1.1
+python-dotenv==1.2.1