Update PSReadLine to v2.4.2-beta2

### Prerequisites

- [x] I have written a descriptive issue title.
- [x] I have searched all [issues](https://github.com/PowerShell/PowerShellEditorServices/issues?q=is%3Aissue) to ensure it has not already been requested.

### Summary

Per https://github.com/PowerShell/PSReadLine/releases/tag/v2.4.2-beta2.

### Proposed Design

_No response_