Bump python-dotenv

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 1.0.0 to 1.2.2.
- [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...v1.2.2)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-version: 1.2.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ai/gen-ai-agents/sql-graph-generator-dashboard/files/backend/requirements.txt

@@ -19,4 +19,4 @@ pandas==2.1.4
 numpy==1.26.2
 
 # Utilities
-python-dotenv==1.0.0
+python-dotenv==1.2.2