(GH-11534) Separate codeblocks for installing with WinGet by ID

[michaeltlombardi]

PR Summary

Prior to this change, the article for installing PowerShell on Windows used a single codeblock to show readers how to install PowerShell and PowerShell preview with WinGet by ID. On the webpage, this results in a single codeblock with a copy button. If a reader uses the copy button and pastes the copied code into their terminal, both commands will run. If a user wanted to install only one edition, they need to edit the copied code to remove the line they don't want.

This change:

• Separates the codeblocks for installing PowerShell with WinGet and specifying the ID parameter for PowerShell and PowerShell preview, so that readers may copy either codeblock and paste into their terminal instead of copying both.
• Fixes #11534
• Fixes AB#343802

PR Checklist

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit 9f2c9cc:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/install/Installing-PowerShell-on-Windows.md	:white_check_mark:Succeeded	View (>=powershell-5.1)

For more details, please refer to the build report.

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