Bump puppeteer from 21.3.6 to 21.3.8 (#2618)

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 21.3.6 to 21.3.8.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/release-please-config.json)
- [Commits](puppeteer/puppeteer@puppeteer-v21.3.6...puppeteer-v21.3.8)

---
updated-dependencies:
- dependency-name: puppeteer
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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