Description

As discussed in https://miro.com/app/board/uXjVIne_7aw=/, we've recently gone through a version update for Go and I got annoyed that it was a manual process and each time I had to remember my previous decisions around the go directive and the toolchain directive.

This issue suggests adding some automation that would ease this.

Expected Output

A new workflow that runs periodically and opens Pull Requests when there is a new version release, bumping the go and toolchain directives.

Out of Scope

Devcontainer images are built on a periodic schedule So we don't expect for them to be available immediately when the Go release comes out: https://github.com/devcontainers/images/tree/main/src/go/history