macOS: use tinyxml1 formula (backport #4091)

[mergify]

This is an automatic backport of pull request #4091 done by Mergify.
Cherry-pick of 7956a5e has failed:

On branch mergify/bp/humble/pr-4091
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	both modified:   source/Installation/Alternatives/macOS-Development-Setup.rst

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To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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