Fix broken github action when running brew tap-new

[PurpleBooth]

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Currently, when pushing a new tap to GitHub Actions you get a failure with an error is a failure with the error "Input requred and not supplied: path"

This is failing because of a missing id in the GitHub Action. This adds that ID.

[request-info]

Please provide a better issue/pull request title and/or description!

[reitermarkus]

Thanks, @PurpleBooth!