Bump python-dotenv from 0.19.0 to 0.21.0

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 0.19.0 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@v0.19.0...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]>

Author: dependabot[bot]

requirements.txt

@@ -14,7 +14,7 @@ pyasn1-modules==0.2.8
 pycodestyle==2.7.0
 pyparsing==3.0.9
 pyTelegramBotAPI==4.0.1
-python-dotenv==0.19.0
+python-dotenv==0.21.0
 requests==2.28.1
 requests-oauthlib==1.3.0
 rsa==4.9