Mac OS X version of 4.15.1 is missing

[taoari]

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Version

What version of the Emulator are you using.

Describe the bug

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No mac os x version for 4.15.1: https://github.com/microsoft/BotFramework-Emulator/releases/tag/v4.15.1.

To Reproduce

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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

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Screenshots

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Additional context

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[bug]