(AB#1942543) Ensure PSConsoleHostReadLine is translatable

[michaeltlombardi]

PR Summary

Prior to this PR, the documentation for PSConsoleHostReadLine did not correctly translate due to the casing of the H2s, which are required to be fully upcased.

This PR upcases those items to ensure the documentation can be properly translated.

• Resolves AB#1942543.

PR Context

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Repository or docset configuration

• Repo documentation and configuration (.git/.github/.vscode etc.)
• Docs build files (.openpublishing.* and build scripts)
• Docset configuration (docfx.json, mapping, bread, module folder)

Conceptual documentation

• Files in docs-conceptual

Cmdlet reference & about_ topics
When changing cmdlet reference or about_ topics, the changes should be copied to all
relevant versions. Check the boxes below to indicate the versions affected by this change.

• Preview content
• Version 7.2 content
• Version 7.1 content
• Version 7.0 content
• Version 5.1 content

PR Checklist

• I have read the contributors guide and followed the style and process guidelines
• PR has a meaningful title
• PR is targeted at the staging branch
• All relevant versions updated
• Includes content related to issues and PRs - see Closing issues using keywords.
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  please add the prefix WIP: or [WIP] to the beginning of the title and remove the prefix when
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[opbld31]

Docs Build status updates of commit 9324444:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/PSReadLine/PSConsoleHostReadLine.md	✅Succeeded	View (powershell-5.1)
reference/7.0/PSReadLine/PSConsoleHostReadLine.md	✅Succeeded	View (powershell-7)
reference/7.1/PSReadLine/PSConsoleHostReadLine.md	✅Succeeded	View (powershell-7.1)
reference/7.2/PSReadLine/PSConsoleHostReadLine.md	✅Succeeded	View (powershell-7.2)
reference/7.3/PSReadLine/PSConsoleHostReadLine.md	✅Succeeded	View (powershell-7.3)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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