Add flag to make Linux script publish to production repo

[rjmholt]

PR Summary

The Linux package release script I wrote requires an extra flag to release to production repos, but I left that out in my original PR. I add that here.

PR Context

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
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• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
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• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
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  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
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    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).

[ghost]

🎉v7.1.0-rc.2 has been released which incorporates this pull request.:tada:

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[ghost]

🎉v7.2.0-preview.1 has been released which incorporates this pull request.:tada:

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[ghost]

🎉v7.0.6 has been released which incorporates this pull request.:tada:

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• Release Notes