Updating for v5

[nrayburn-tech]

Prerequisites

• [X] I have written a descriptive issue title
• [X] I have searched existing issues to ensure the issue has not already been raised

Issue

I'm looking to update this repo for v5. https://github.com/fastify/fastify/issues/5116

Changes Needed (Please let me know if anything might be missing)

• Updaate dependencies
• Update workflows to use v4