feat(actions): update the go-version field to use a string instead of a number

[Gearheads]

What this PR does / why we need it:
This PR will fix the issue within the goreleaser GitHub Action:

⨯ release failed after 0s                  error=hook failed: go mod download: exit status 2; output: go: unknown subcommand "mod"
Run 'go help' for usage.

Turns out there is a behavior with YAML where if we provide a number the YAML will be parsed to ignore the trailing zero. Therefore, instead of using Go1.20, the GitHub Action was using Go1.2:

Successfully set up Go version 1.2
##[add-matcher]/home/runner/work/_actions/actions/setup-go/v3/matchers.json
##[debug]Added matchers: 'go'. Problem matchers scan action output for known warning or error strings and report these inline.
go version go1.2.2 linux/amd64

I was able to confirm that other users ran into the same issue: actions/setup-go#326 (comment)

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes # goreleaser 61

This branch can be deleted once it is merged.