Fix resource path for App Service Easy Auth

[kheiakiyama]

Fix resource path ref: https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-file-based#enabling-file-based-configuration

[prmerger-automator[bot]]

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[opbld33]

Learn Build status updates of commit 46c23a0:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/app-service/overview-authentication-authorization.md	:white_check_mark:Succeeded

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[Jak-MS]

@cephalin

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[cephalin]

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