Bump puppeteer from 19.7.1 to 20.8.1

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 19.7.1 to 20.8.1.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/release-please-config.json)
- [Commits](puppeteer/puppeteer@puppeteer-v19.7.1...puppeteer-v20.8.1)

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

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

package.json

@@ -68,7 +68,7 @@
     "eslint-config-prettier": "8.8.0",
     "nyc": "15.1.0",
     "prettier": "2.8.8",
-    "puppeteer": "19.7.1",
+    "puppeteer": "20.8.1",
     "serve-static": "1.15.0",
     "tap-dot": "2.0.0",
     "tape": "5.6.3"