Fix necessary typos

[Rageking8]

[prmerger-automator[bot]]

@Rageking8 : Thanks for your contribution! The author(s) have been notified to review your proposed change.

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

Learn Build status updates of commit a5db6e8:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/azure-vmware/concepts-vulnerability-management.md	:white_check_mark:Succeeded
articles/frontdoor/standard-premium/how-to-add-custom-domain.md	:white_check_mark:Succeeded

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[Court72]

@rageking8,

The article articles/azure-vmware/concepts-vulnerability-management.md has been updated since the pull request was created, and the article no longer exists. If you'd like to submit the change for the article articles/frontdoor/standard-premium/how-to-add-custom-domain.md, please submit a new PR.

Thanks for your contribution.