build(deps-dev): 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:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -22,7 +22,7 @@ mypy = "^1.18.2"
 pytest = "^8.4.2"
 pytest-asyncio = "^1.2.0"
 pytest-cov = "^7.0.0"
-python-dotenv = "^1.1.1"
+python-dotenv = "^1.2.1"
 httpx = "^0.28.1"
 pytest-httpx = "^0.35.0"
 pytest-httpserver = "^1.1.2"