Merge version 2.0.4 to address Issue #39

[Mayyhem]

Description

Fixed Issue #39 by using signing certificate instead of encryption certificate.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Testing

Tested in three labs using command: get secrets -mp site-mp -sc ps1 -u "MAYYHEM\chell$" -p "..." -r mydevice and get secrets

Bonus Points:

• I have commented my code, particularly in hard-to-understand areas
• I have incremented the build/revision number in https://github.com/Mayyhem/SharpSCCM/blob/main/Properties/AssemblyInfo.cs
• I have made corresponding changes to the documentation
• I have added unit tests that prove my fix is effective or that my feature works