Update-PSScriptFileInfo modifies Description even when -Description parameter is not used

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest released version
• Search the existing issues.

Steps to reproduce

When Update-PSScriptInfo is used to change script metadata, the Description property of Comment-based help is modified event when Description parameter is not used.

The sample script to test the problem: Update-PSInfo.ps1

Expected behavior

Both the placement of Description property is changed and also, the formatting of content is changed.

Expected behavior

PS> Get-Content Update-PSInfo.ps1

<#PSScriptInfo
  .VERSION 1.0.0
. . .
#>
<#
  .SYNOPSIS
    A short synopsis
  .DESCRIPTION
    A longer description.

    Second paragraph
. . .

PS> Update-PSScriptFileInfo -Path Update-PSInfo.ps1 -Version 1.1.0
PS> Get-Content Update-PSInfo.ps1

<#PSScriptInfo
  .VERSION 1.1.0
. . .
#>
<#
  .SYNOPSIS
    A short synopsis
  .DESCRIPTION
    A longer description.

    Second paragraph
. . .

Actual behavior

PS> Update-PSScriptFileInfo -Path Update-PSInfo.ps1 -Version 1.1.0
PS> Get-Content Update-PSInfo.ps1

<#PSScriptInfo

.VERSION 1.1.0
. . .
#>
<#

.DESCRIPTION
    A longer description.
    Second paragraph

  .SYNOPSIS
    A short synopsis
. . .

Error details

Environment data

• PowerShell version: 5.1, 7.5.1
• PSResourceGet version: 1.1.1

Visuals

No response

Start with the linked Update-PSInfo.ps1 reproduction and the Update-PSScriptFileInfo entry point in PSResourceGet. Compare the expected and actual output when only -Version is supplied, then run the relevant existing tests if available. Done means the description remains in place with its paragraph formatting unchanged when -Description is omitted.