Fixes #140 - Add note about importing new version of module

[sdwheeler]

Add note about importing new version of module

• Fixes AB#261944
• Fixes #140

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

Learn Build status updates of commit 97bebb4:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
powershell-gallery/powershellget-3.x/Microsoft.PowerShell.PSResourceGet/Install-PSResource.md	:white_check_mark:Succeeded	View (powershellget-3.x)
powershell-gallery/powershellget-3.x/Microsoft.PowerShell.PSResourceGet/Update-PSResource.md	:white_check_mark:Succeeded	View (powershellget-3.x)

For more details, please refer to the build report.

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