Reformatted disk cache change warning message

[mikefrobbins]

No description provided.

[opbld31]

Docs Build status updates of commit b505ee4:

🕙 Full build: the average full build time is 28 min(s) 18 sec(s), this is based on the last 443 build(s) for this repository.

[opbld30]

Docs Build status updates of commit b505ee4:

✅ Validation status: passed

File	Status	Preview URL	Details
azuresmps-4.0.0/Azure/Set-AzureDataDisk.md	✅Succeeded	View (azuresmps-4.0.0)

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