Bump puppeteer from 21.3.6 to 21.6.0

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 21.3.6 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-v21.3.6...puppeteer-v21.6.0)

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

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

package.json

@@ -17,7 +17,7 @@
     "express": "^4.18.2",
     "http-server": "^14.1.1",
     "mocha": "^10.2.0",
-    "puppeteer": "^21.3.6",
+    "puppeteer": "^21.6.0",
     "webpack": "^5.75.0",
     "webpack-cli": "^5.0.1"
   },