Update dependency cibuildwheel to v2.21.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cibuildwheel (changelog)	==2.21.0 -> ==2.21.1

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Release Notes

pypa/cibuildwheel (cibuildwheel)

v2.21.1: Version 2.21.1

Compare Source

• 🐛 Fix a bug in the Linux build, where files copied to the container would have invalid ownership permissions (#​2007)
• 🐛 Fix a bug on Windows where cibuildwheel would call upon uv to install dependencies for versions of CPython that it does not support (#​2005)
• 🐛 Fix a bug where uv 0.4.10 would not use the right Python when testing on Linux. (#​2008)
• 🛠 Bump our documentation pins, fixes an issue with a missing package (#​2011)

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