chore(deps): update rust crate blake3 to v1.8.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
blake3	workspace.dependencies	patch	1.8.4 → 1.8.6

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Release Notes

BLAKE3-team/BLAKE3 (blake3)

v1.8.6

Compare Source

version 1.8.6

Changes since 1.8.5:

• update_mmap and update_mmap_rayon (and by extension b3sum) now
  use seek rather than metadata to get the length of a file/mapping,
  and they tolerate mmap failures. That means b3sum will now memory
  map e.g. Linux block devices, which support mapping despite reporting
  length 0 in metadata. Hashing NUL files on Windows also works now,
  where previously it was an error unless you used --no-mmap or <.
  This change was originally proposed by @​nabijaczleweli.

v1.8.5

Compare Source

version 1.8.5

Changes since 1.8.4:

• Forcibly disable LTO when compiling C intrinsics from the Rust build.
  This fixes a build break on Arch Linux ARM:
  #​550

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