Update dependency cibuildwheel to v4.2.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
cibuildwheel (changelog)	==4.2.0 → ==4.2.1

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Release Notes

pypa/cibuildwheel (cibuildwheel)

v4.2.1

Compare Source

• 🐛 Respects the NuGet package sources configured on the machine when installing CPython on Windows, instead of always falling back to nuget.org (#​2966)
• 🐛 Fixes a NameError on Pyodide when an already-compatible wheel was reused, which made the test step fail (#​2968)
• 🛠 Updates the Android Python versions, and the Android testbed's Gradle version, making it compatible with Java 25 (#​2962)
• 🛠 Updates dependencies including CPython 3.15.0rc2 (#​2965, #​2970, #​2976, #​2981, #​2985)

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[radarhere]

Helps #9330 by allowing for Python 3.15.0rc2 wheels.