Bump Golang version only when new go-buildpack is released

[jochenehret]

Hi DRATs Developers,

a minor issue: The Golang version was recently updated:
5649dc3

This also updated the "credhub-test-app" to Golang 1.22.6. Now currently there is no go-buildpack available with that version. The latest go-buildpack v1.10.21 supports only Golang 1.22.5. This is why the "bbr-run-drats" acceptance test failed again:
https://concourse.wg-ard.ci.cloudfoundry.org/teams/main/pipelines/cf-deployment/jobs/bbr-run-drats/builds/1449

So before updating the test apps, could you please check if there is already a go-buildpack version released that supports the new Golang version?

Thanks and Best Regards,

Jochen.