Correct a small type (Tt -> It)

[lamosley]

Correct a small type (Tt -> It) which is confusing to non-native English speakers

[prmerger-automator[bot]]

@lamosley : 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 f88a496:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
memdocs/configmgr/core/servers/manage/modify-your-infrastructure.md	:white_check_mark:Succeeded

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[dougeby]

#sign-off

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @banreet