chore(deps): bump rustix from 0.38.17 to 0.38.21

[dependabot[bot]]

Bumps rustix from 0.38.17 to 0.38.21.

Commits

• cf2ad7f chore: Release rustix version 0.38.21
• 4186613 Miscellaneous documentation cleanups.
• bde49f1 Adjust sockaddr lengths for illumos in more more place. (#904)
• b0a83ce Add connect_unspec (#903)
• b01b482 Fix getsockopt zeroing memory (#901)
• 36e3999 Fix a test failures on illumos. (#900)
• 1ab21e6 Fix p{read,write}v{,v2}'s encoding of the offset argument on Linux. (#896)
• 0b7ccf4 Miscellaneous documentation cleanups. (#894)
• 3f338d8 Fix miscellaneous clippy lints. (#893)
• e2314b7 Fix renameat_with with flags on Android. (#892)
• Additional commits viewable in compare view

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