update actions and dependencies

github-actions(deps): bump shivammathur/setup-php from 2.7.0 to 2.8.0

Bumps [shivammathur/setup-php](https://github.com/shivammathur/setup-php) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/shivammathur/setup-php/releases)
- [Commits](https://github.com/shivammathur/setup-php/compare/2.7.0...a67fcb9922a5f2d7b414e2c7ba85a39736f701a5)

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