github auth will change

[hx-markterry]

The github.authenticate() function is deprecated (and has been for a long time now), and needs changing to something like this:
11:34
const { Octokit } = require('@octokit/rest')
const github = new Octokit({
userAgent: 'holidayextras/dockyard-deploy',
auth: process.env.GITHUB_TOKEN
})
^^ preferably with a more descriptive name to make it easier to identify clients 😉