Update disable-access-to-exchange-online-powershell.md

[chrisda]

Issue #8603

[opbld32]

Docs Build status updates of commit 654e88d:

✅ Validation status: passed

File	Status	Preview URL	Details
exchange/docs-conceptual/disable-access-to-exchange-online-powershell.md	✅Succeeded	View (exchange-ps)

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Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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