fix: correct 'lastest' typo to 'latest' in go-mod.mk output

[Copilot]

Fixes a misspelling in user-facing output in z-MakefileUtils/go-mod.mk.

Checklist

• I have read the Contributor Guide
• I have read and agree to the Code of Conduct
• I have read github basic-writing-and-formatting-syntax
• I have added a description of my changes and why I'd like them included in the section below

Description of Changes

• z-MakefileUtils/go-mod.mk (lines 26, 32): Replace lastest → latest in both the echoed example command string and the runtime awk formatting string inside go.mod.fetch.

# before
@go list -mod mod -m -versions github.com/stretchr/testify | awk '{print $$1 " lastest: " $$NF }'

# after
@go list -mod mod -m -versions github.com/stretchr/testify | awk '{print $$1 " latest: " $$NF }'

Related Issues

Addresses feedback from #4 review comment.

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