PR Summary

When running Start-PSPester the SelfSignedCertificate is automatiacally added to the environment. this results in the creation of test\tools\Modules\SelfSignedCertificate\SelfSignedCertificate.psd1 and test\tools\Modules\SelfSignedCertificate\SelfSignedCertificate.psm1. These files will then show as being added in git status. As these do not ever need to be committed back to the repo, they should be ignored. this PR updates the .gitignore file to prevent this.

PR Context

Supper annoying when developing. 😄

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Change is not breaking
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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• User-facing changes
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  • Documentation needed
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