chore(deps): update python-dotenv requirement in /bots/gsbot (#140)

Updates the requirements on [python-dotenv](https://github.com/theskumar/python-dotenv) to permit the latest version.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v1.0.0...v1.2.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

bots/gsbot/requirements.txt

@@ -1,6 +1,6 @@
 # Discord Bot
 discord.py>=2.7.1
-python-dotenv>=1.0.0
+python-dotenv>=1.2.1
 
 # Database
 sqlalchemy>=2.0.49