Update api-management-howto-protect-backend-with-aad.md

[karthik-ramasamy]

for v2 endpoints, set accessTokenAcceptedVersion property to 2

[prmerger-automator[bot]]

@karthik-ramasamy : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod[bot]]

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[ShannonLeavitt]

@dlepow

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

[PMEds28]

@dlepow

Can you review this old PR and determine whether it needs to be closed or merged?

@MicrosoftDocs/public-repo-pr-review-team

[dlepow]

#sign-off

[learn-build-service-prod[bot]]

Learn Build status updates of commit 00c3d3e:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/api-management/api-management-howto-protect-backend-with-aad.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

For any questions, please:

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• Post your question in the Learn support channel