Fixes #12272 - Update notes on PSRP changes

[sdwheeler]

PR Summary

Update notes on PSRP changes

• Fixes AB#482024
• Fixes PowerShell remoting protocol is updated to deprecate the key exchange used for transmitting SecureString object #12272

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 contributor's guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

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[learn-build-service-prod]

Learn Build status updates of commit 60af6af:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.6/Microsoft.PowerShell.Core/About/about_Remote_Requirements.md	✅Succeeded	View (powershell-7.6)
reference/docs-conceptual/security/security-features.md	✅Succeeded	View (>=powershell-5.1)

For more details, please refer to the build report.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit 3960806:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.6/Microsoft.PowerShell.Core/About/about_Remote_Requirements.md	✅Succeeded	View (powershell-7.6)
reference/docs-conceptual/security/security-features.md	✅Succeeded	View (>=powershell-5.1)

For more details, please refer to the build report.