build(deps): bump pydantic from 2.7.4 to 2.8.0 in /agenta-cli

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.7.4 to 2.8.0.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.7.4...v2.8.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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