fix useAuth decorator link to authentication section

[rahimi-ali]

Fix the link syntax and target

[github-actions]

Changes in this PR will be published to the following url to try(check status of TypeSpec Pull Request Try It pipeline for publish status):
Playground: https://cadlplayground.z22.web.core.windows.net/prs/2317/

Website: https://cadlwebsite.z1.web.core.windows.net/prs/2317/

[markcowl]

It looks like the linter needs to be executed to pass ci. Most likely this is a subtle change in the linter for markdown files

[daviwil]

@rahimi-ali @markcowl I fixed the issue preventing CI from passing but it seems that it's now triggered the CLA notice. Let me know if you have trouble signing it (or if you can't), @rahimi-ali and I can reopen this PR myself. Thanks!

[rahimi-ali]

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Problem has been resolved

[daviwil]

Thanks for the contribution @rahimi-ali!