typo: Double word "the"

[nschonni]

[opbld32]

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/Debugging-CNTK-source-code-in-Visual-Studio.md	:white_check_mark:Succeeded	View
articles/Serialization.md	:white_check_mark:Succeeded	View
articles/Setup-OpenCV-on-Linux.md	:white_check_mark:Succeeded	View

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