Added maximum history size

[nguyen-dows]

Added maximum history size to the History Size docs as per: https://github.com/MicrosoftDocs/terminal/issues/510 The maximum history size is 32767 (which is similar to the value of SHRT_MAX)

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

Learn Build status updates of commit b1a697f:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
TerminalDocs/customize-settings/profile-advanced.md	:white_check_mark:Succeeded	View

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