Bump clue/buzz-react from 2.5.0 to 2.6.0

Bumps [clue/buzz-react](https://github.com/clue/reactphp-buzz) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/clue/reactphp-buzz/releases)
- [Changelog](https://github.com/clue/reactphp-buzz/blob/master/CHANGELOG.md)
- [Commits](clue/reactphp-buzz@v2.5.0...v2.6.0)

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Author: dependabot-support