Add support for iOS in unix.rs

[Skyline-23]

This pull request makes a small update to the platform support logic in src/platform/unix.rs by adding ios to the list of supported operating systems for both the Debug and PartialEq trait implementations for UTSName. This ensures that the code correctly compiles and behaves on iOS targets.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.32%. Comparing base (2d02c08) to head (843a032).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #100   +/-   ##
=======================================
  Coverage   93.32%   93.32%           
=======================================
  Files           4        4           
  Lines         734      734           
=======================================
  Hits          685      685           
  Misses         49       49           

Flag	Coverage Δ
macos_latest	99.15% <ø> (ø)
ubuntu_latest	99.18% <ø> (ø)
windows_latest	92.59% <ø> (ø)

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[cakebaker]

Thanks for your PR!