Update the go-version in the example as a string.

[sijysn]

Why:

Closes: #24926

What's being changed (if available, include any code snippets, screenshots, or gifs):

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• For content changes, I have completed the self-review checklist.

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Content directory changes

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Source	Preview	Production	What Changed
actions/automating-builds-and-tests/building-and-testing-go.md	fpt ghec ghes@ 3.8 3.7 3.6 3.5 3.4 ghae	fpt ghec ghes@ 3.8 3.7 3.6 3.5 3.4 ghae

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server
ghae: GitHub AE

[cmwilson21]

@sijysn Thank you for opening a PR and linking it to your issue! ✨

I'll get this triaged for review! ⚡

[sijysn]

@cmwilson21
I have checked!

https://docs-24927-cebfba.preview.ghdocs.com/en/actions/automating-builds-and-tests/building-and-testing-go#using-the-go-starter-workflow

[sijysn]

This PR resolved the issue. Thank you.
#25146

[cmwilson21]

@sijysn Thank you for coming back and letting us know! ✨