Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

We define the Go version in multiple places, at least the following:

• dogfood/coder/Dockerfile
• flake.nix
• go.mod
• .github/actions/setup-go/action.yaml

And, we keepupdatingsome but not all of them at once. We need some way to keep them in sync.

Ideally, we'd have some single source of truth for the Go version in the repo. If that's impractical, some sort of CI check to ensure they are all in sync.

Relevant Log Output

Expected Behavior

No response

Steps to Reproduce

Look at the files and see they don't use the same version.

Environment

• Host OS:
• Coder version:

Additional Context

No response