build(deps): Bump rayon from 1.10.0 to 1.12.0

[dependabot]

Bumps rayon from 1.10.0 to 1.12.0.

Changelog

Sourced from rayon's changelog.

Release rayon 1.12.0 (2026-04-13)

• Fixed a bug in parallel Range<char> when the end is 0xE000, just past the surrogate boundary, which was unsafely producing invalid char values.
• The new method ParallelSlice::par_array_windows works like par_windows but with a constant length, producing &[T; N] items.

Release rayon 1.11.0 / rayon-core 1.13.0 (2025-08-12)

• The minimum supported rustc is now 1.80.
• iter::repeatn has been renamed to iter::repeat_n to match the name stabilized in the standard library. The old name still exists as a deprecated function for compatibility.
• Fixed a bug in in_place_scope when the default global registry uses the current thread, like on WebAssembly without threading support.
• binary_heap::Iter no longer requires a temporary allocation.
• Relaxed trait bounds on many of the public structs.
• Implemented IntoParallelIterator for Box<[T]> and its references.
• Implemented FromParallelIterator<_> for Box<str> via String.

Commits

• 7449d7d Merge #1093
• b3d9e3f Release rayon 1.8.0 and rayon-core 1.12.0
• 3fe51e5 Fix clippy::let_and_return
• 082f215 Merge #1087
• ea0c06d core: registry: Factor out "wait till out of work" part of the main loop.
• 75524e2 Merge #1063
• 01d2800 Ignore the multi-threaded test on emscripten/wasm
• 40b59c0 core: Make use_current_thread error rather than panic when already in the pool.
• f4db4d7 core: tests: Add some basic tests for ThreadPoolBuilder::use_current_thread.
• 87274ad core: registry: Add some more documentation for ThreadPoolBuilder::use_curren...
• Additional commits viewable in compare view

Most Recent Ignore Conditions Applied to This Pull Request

Dependency Name	Ignore Conditions
rayon	[>= 1.11.a, < 1.12]

[tgeoghegan]

@dependabot rebase

[tgeoghegan]

We can't take this on release/0.16 because rayon's MSRV is now 1.80, exceeding our MSRV of 1.71.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.