Adding the kiota logo

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

Learn Build status updates of commit af3fbab:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
OpenAPI/index.yml	:white_check_mark:Succeeded
OpenAPI/kiota/images/kiota.png	:white_check_mark:Succeeded
OpenAPI/kiota/overview.md	:white_check_mark:Succeeded

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