7.2.3 Updated the document with the latest version number.

[Mikey Bronowski (MikeyBronowski)]

PR Summary

Updated the document with the latest version number 7.2.3 + updated the preview version mentioned in the doc to 7.3.0.3.

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.
• This PR is ready to merge and is not Work in Progress. If the PR is work in progress,
  please add the prefix WIP: or [WIP] to the beginning of the title and remove the prefix when
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[opbld33]

Docs Build status updates of commit 5c83cc7:

✅ Validation status: passed

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

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.

For any questions, please:

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[Mikey Lombardi (He/Him) (michaeltlombardi)]

This looks great, thanks so much for the contribution, Mikey Bronowski (@MikeyBronowski)!