Update Puppeteer to 22

[jcarstairs-scottlogic]

We're using Puppeteer ~9.9.1. Puppeteer now only officially supports versions >= 19.4.0. At the time of writing, the latest stable version is 21.5.2. As this is quite a big dependency, it's probably a good idea to try and update this.

(Sorry that this issue isn't well fleshed-out! I thought it was better to have it written down without any research than not at all.)

[jamesobrooks]

Also of note, the Puppeteer image is no longer maintained by Buildkite. We recently ran into an issue where a language feature did not have browser support because the version of Chrome is out-of-date.