Update python-dotenv requirement from >=1.0.0 to >=1.2.2 (#986)

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...v1.2.2)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sam <sam@diagrid.io>

Author: dependabot[bot]

dev-requirements.txt

@@ -15,7 +15,7 @@ Flask>=1.1
 # needed for auto fix
 ruff===0.14.1
 # needed for .env file loading in examples
-python-dotenv>=1.0.0
+python-dotenv>=1.2.2
 # needed for enhanced schema generation from function features
 pydantic>=2.13.3
 # needed for yaml file generation in examples