chore(deps-dev): bump @web/test-runner-playwright from 0.8.4 to 0.8.8

Bumps [@web/test-runner-playwright](https://github.com/modernweb-dev/web/tree/HEAD/packages/test-runner-playwright) from 0.8.4 to 0.8.8.
- [Release notes](https://github.com/modernweb-dev/web/releases)
- [Changelog](https://github.com/modernweb-dev/web/blob/master/packages/test-runner-playwright/CHANGELOG.md)
- [Commits](https://github.com/modernweb-dev/web/commits/@web/[email protected]/packages/test-runner-playwright)

---
updated-dependencies:
- dependency-name: "@web/test-runner-playwright"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]