build(deps): bump puppeteer from 21.5.1 to 21.6.0

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 21.5.1 to 21.6.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/release-please-config.json)
- [Commits](puppeteer/puppeteer@puppeteer-v21.5.1...puppeteer-v21.6.0)

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

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