Chore: Update `Node.js` Version

[nelsonic]

Current version(s) in ci.yml are woefully out-of-date!

hapi-auth-jwt2/.github/workflows/ci.yml

Lines 19 to 20 in d7b09d9

	node-version: [18.x, 20.x, 21.x]
	# See supported Node.js release schedule at https://nodejs.org/en/about/releases/

Todo

• Update to latest + LTS: https://nodejs.org/en/download