(GH-104) Fix `-Type` parameter in `Find-PSResource`

[michaeltlombardi]

PR Summary

Prior to this change, the reference documentation for the -Type parameter of the Find-PSResource cmdlet incorrectly listed Command and DscResource as valid options for the parameter.

This change:

• Removes the erroneous value options from the parameter docs
• Resolves #104
• Fixes AB#200724

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 14d83aa:

:white_check_mark: Validation status: passed

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

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