build(deps): bump python-dotenv in /scripts/mcp/DiscoveryAgent/Rich

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 1.2.1 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](https://github.com/theskumar/python-dotenv/compare/v1.2.1...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>

scripts/mcp/DiscoveryAgent/Rich/requirements.txt

@@ -1,4 +1,4 @@
 httpx==0.28.1
 pydantic==2.12.5
-python-dotenv==1.2.1
+python-dotenv==1.2.2
 rich==14.2.0