Add VAT number format per country

[rgaritta]

Updating VAT number row (per Julia)

[opbld32]

Docs Build status updates of commit 06f2e1a:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
Advertising/bingads-13/customer-management-service/advertiseraccount.md	:white_check_mark:Succeeded	View (=bingads-13)

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[rgaritta]

Closing pull request, Julia will now submit pull request for this file.