Updated code samples so they can be run by copy-pasting into PowerShell - changed – to -

[bubbletroubles]

The examples use the – symbol which is ASCII character 2013. This is not the standard - (ASCII 203d) character used in code, and means the examples can't be copy-pasted into PowerShell.

This PR updates the invalid characters and replaces them with the correct - characters

See the error that VS Code shows when the code is copy-pasted from this article

and the error that happens when you run the commands as pasted

[learn-build-service-prod]

Learn Build status updates of commit 67987b0:

✅ Validation status: passed

File	Status	Preview URL	Details
power-platform/admin/powerapps-powershell.md	✅Succeeded

For more details, please refer to the build report.

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