Update Rust crate either to v1.16.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
either	dependencies	minor	1.15.0 → 1.16.0

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Release Notes

rayon-rs/either (either)

v1.16.0

Compare Source

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Configuration

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[codspeed-hq]

Merging this PR will not alter performance

✅ 20 untouched benchmarks
⏩ 9 skipped benchmarks¹

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_{Comparing renovate/either-1.x-lockfile (6e1841e) with main (7e2214b)}

Footnotes

1. 9 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩