Updating ms.prod and ms.technology to ms.service and ms.subservice

[drewbatgit]

The old metadata fields will start triggering build warnings. Fixing for all repos under jken's org.

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

Learn Build status updates of commit ed6cb6c:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
TerminalDocs/docfx.json	:white_check_mark:Succeeded

For more details, please refer to the build report.

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