chore(deps): update rust crate nix to v0.31.3 (develop-3.x)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
nix	dependencies	patch	0.31.2 → 0.31.3

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Release Notes

nix-rust/nix (nix)

v0.31.3

Compare Source

Added

• Enable module ioctl for Cygwin
  (#​2715)
• Add
  CLOCK_BOOTTIME/CLOCK_PROCESS_CPUTIME_ID/CLOCK_THREAD_CPUTIME_ID/CLOCK_UPTIME
  to NetBSD-like platforms (#​2716)
• unistd: add mkfifo for redox
  (#​2749)
• Added kevent64 support on apple targets: Kqueue::kevent64, KEvent64,
  and Kevent64Flags. (#​2781)

Fixed

• fix SaFlags_t definition on redox
  (#​2751)
• Fixed EpollEvent::events() to use from_bits_retain instead of
  from_bits().unwrap(), preventing panics when the kernel returns
  unknown epoll flags. (#​2783)
• Fixed KEvent::flags() and KEvent::fflags() to use from_bits_retain
  instead of from_bits().unwrap(), preventing panics when the kernel
  returns unknown kqueue flags.
  (#​2784)

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