Build-PSBuildModule Compile UTF-8 File

[HeyItsGilbert]

We attempt to append UTF-8 encodings later, but the initial file isn't set to that. This should fix it.

Description

When building a compiled module it was observed that the the Meta tests to check for UTF-8 was filing on the newly created psm1. This fix sets the intial file to be utf-8 encoded.

Running tests from 'Meta.tests.ps1'
WARNING: File 
D:\actions-runner\_work\InternalModule\InternalModule\Output\InternalModule\0.7.0\InternalModule.psm1 contains 0x00 bytes. It probably uses Unicode/UTF-16 and needs to be converted to UTF-8. Use Fixer 
"Get-UnicodeFilesList $pwd | ConvertTo-UTF8".
Error: [-] Meta.tests.ps1 failed with:
Message
  Expected 0, but got 1.
  at $unicodeFilesCount | Should -Be 0, D:\actions-runner\_work\InternalModule\InternalModule\tests\Meta.tests.ps1:24
  at <ScriptBlock>, D:\actions-runner\_work\InternalModule\InternalModule\tests\Meta.tests.ps1:24

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have added this change to the CHANGELOG.md.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.