Bump python-dotenv from 0.20.0 to 0.21.0

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v0.20.0...v0.21.0)

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

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

setup.py

@@ -57,7 +57,7 @@ def find_version(*file_paths):
         "python-dateutil==2.8.1",
         "Jinja2==3.1.2",
         "psutil==5.9.1",
-        "python-dotenv==0.20.0",
+        "python-dotenv==0.21.0",
         "terminaltables==3.1.10",
         "requests==2.28.0",
         "GitPython==3.1.27",