opentelemetry-cpp: fix test

[carlocab]

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• Have you checked that there aren't other open pull requests for the same formula update/change?
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• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
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Follow-up to #131405.

[carlocab]

Thanks @EricFromCanada!

[github-actions]

🤖 An automated task has requested bottles to be published to this PR.

[ZhongRuoyu]

Thanks!