Update Start-Cluster.md - Clarify behavior of -IgnorePersistentState

[danupton]

PR Summary

Adds an extra sentence to the description of IgnorePersistentState to clarify that the behavior must be manually disabled.

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit 5641c87:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2025-ps/failoverclusters/Start-Cluster.md	✅Succeeded	View (WindowsServer2025-ps)

For more details, please refer to the build report.

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[learn-build-service-prod]

Learn Build status updates of commit bf4df7c:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2025-ps/failoverclusters/Start-Cluster.md	✅Succeeded	View (WindowsServer2025-ps)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel