WIP: Align InvokePrompt description with new behavior (MicrosoftDocs#12157)

[jftkcs]

PR Summary

• Document source changes in pr Add Y bounds check to InvokePrompt (Fixes #4790) PowerShell/PSReadLine#4791
• Fixes Update PSReadline documentation for InvokePrompt behavior change. #12157
• Updates description of InvokePrompt specifying the tweaked behavior: Method will not perform any action if the request cannot be completed and the user didn't intentionally specify an impossible Y position argument.

Marked as WIP until downstream PR is approved/resolved/closed.

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]

Learn Build status updates of commit e350c5a:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-5.1)
reference/7.4/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.4)
reference/7.5/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.5)
reference/7.6/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.

[jftkcs]

@microsoft-github-policy-service agree

[github-actions]

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[learn-build-service-prod]

Learn Build status updates of commit f2b64b7:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-5.1)
reference/7.4/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.4)
reference/7.5/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.5)
reference/7.6/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.