Fix Azure functions action description

[sevi1603]

Replaced 'Azure/azure-functions' with correct description 'Azure/functions-action'

[prmerger-automator]

@sevi1603 : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 3132849:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/azure-functions/functions-how-to-github-actions.md	✅Succeeded

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[Copilot]

Pull Request Overview

This PR corrects the GitHub action name reference in the Azure Functions documentation from an incorrect name to the proper action identifier.

• Fixes incorrect GitHub action name reference in documentation

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[ShannonLeavitt]

@ggailey777

Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team