spidermonkey: migrate to [email protected]

[cho-m]

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[Copilot]

Pull Request Overview

This PR updates the spidermonkey formula to use Python 3.14 instead of Python 3.13 as a build dependency. To support this change, a patch is added to backport Python 3.14 compatibility from the upstream firefox repository.

• Updates build dependency from [email protected] to [email protected]
• Adds a patch to backport Python 3.14 support from mozilla-firefox/firefox

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