chore(deps): Bump the minor-and-patch group across 1 directory with 2 updates

Bumps the minor-and-patch group with 2 updates in the /a2a/slack_researcher directory: [tavily-python](https://github.com/tavily-ai/tavily-python) and [python-dotenv](https://github.com/theskumar/python-dotenv).


Updates `tavily-python` from 0.7.26 to 0.8.0
- [Commits](https://github.com/tavily-ai/tavily-python/commits)

Updates `python-dotenv` from 1.2.2 to 1.2.3
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v1.2.2...v1.2.3)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-version: 1.2.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: tavily-python
  dependency-version: 0.7.27
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
...

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Author: dependabot[bot]