Fix powershell install specific version command

[antontroshin]

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Description

Powershell command pulling script content no longer worked properly on newer powershell versions 5+

Issue reference

Please reference the issue this PR will close: dapr/cli#1316

[hhunter-ms]

@antontroshin just checking - do any other repos need to be updated before I merge this?

[antontroshin]

@hhunter-ms I found the issue causing the error. This happens when the command is executed from Powershell, but the command works fine when executed from Command Prompt.
Both original and command in this PR are virtually the same.
I'll close this PR as this won't solve the original issue.
Will find another solution.
Thanks.