fix(ci): correct duplicate step name in test-go.yaml

[puwun]

What this PR does / why we need it:
Renamed the duplicate Check go fmt step to Check go vet in test-go.yaml, since it runs make vet

Checklist:

• Docs included if any changes are user facing

[github-actions]

🎉 Welcome to the Kubeflow Trainer! 🎉

Thanks for opening your first PR! We're happy to have you as part of our community 🚀

Here's what happens next:

• If you haven't already, please check out our Contributing Guide for repo-specific guidelines and the Kubeflow Contributor Guide for general community standards.
• Our team will review your PR soon! cc @kubeflow/kubeflow-trainer-team

Join the community:

• Slack: Join our #kubeflow-trainer Slack channel.
• Meetings: Attend the Kubeflow AutoML and Training Working Group bi-weekly meetings.

Feel free to ask questions in the comments if you need any help or clarification!
Thanks again for contributing to Kubeflow! 🙏

[Copilot]

Pull request overview

This PR cleans up the Go CI workflow by correcting a misleading duplicate step name so the job output accurately reflects what is being executed.

Changes:

• Renames the duplicate Check go fmt step to Check go vet in .github/workflows/test-go.yaml to match the make vet command it runs.

[coveralls]

Pull Request Test Coverage Report for Build 21998263416

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 56.026%

---

Totals
Change from base Build 21901958788:	0.0%
Covered Lines:	1390
Relevant Lines:	2481

---

💛 - Coveralls

[andreyvelich]

Thanks @puwun!
/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andreyvelich

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [andreyvelich]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment