Update endpoints-china.md

[LittleRedBean (AgnesLi666)]

the Azure AD `Graph link has the wrong root domain: https://graph.chinacloudapi.cn

[prmerger-automator]

LittleRedBean (@AgnesLi666) : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change. Paolo Matarazzo (@paolomatarazzo)

[prmerger-automator]

LittleRedBean (@AgnesLi666) : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change. Paolo Matarazzo (@paolomatarazzo)

[learn-build-service-prod]

Learn Build status updates of commit b0eec92:

✅ Validation status: passed

File	Status	Preview URL	Details
intune/fundamentals/endpoints-china.md	✅Succeeded

For more details, please refer to the build report.

[Regan Downer (v-regandowner)]

@MicrosoftDocs/msecd-maintainers

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

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. Paolo Matarazzo (@paolomatarazzo)