Bump the cargo group across 1 directory with 3 updates

[dependabot]

Bumps the cargo group with 3 updates in the /circ_blocks directory: rand, crossbeam-channel and keccak.

Updates rand from 0.8.5 to 0.8.6

Changelog

Sourced from rand's changelog.

[0.8.6] - 2026-04-14

This release back-ports a fix from v0.10. See also #1763.

Changes

• Deprecate feature log (#1772)

#1763: rust-random/rand#1763 #1772: rust-random/rand#1772

• Drop the experimental simd_support feature.

Commits

• 5309f25 0.8.6 (#1772): update for recent nightly rustc and backport #1764
• 1126d03 When testing rustc 1.36, use compatible dependencies.
• 143b602 Add Cargo.lock.msrv.
• 9be86f2 Fix cross build test.
• 5e0d50d Drop simd_support.
• 8ff02f0 Upgrade cache action.
• 4ad0cc3 Don't test for unsupported target architecture.
• 258e6d0 Address warning.
• 9f0e676 Mark some internal traits as potentially unused.
• 6f123c1 Workaround never constructed and never used warning.
• Additional commits viewable in compare view

Updates crossbeam-channel from 0.5.13 to 0.5.15

Release notes

Sourced from crossbeam-channel's releases.

crossbeam-channel 0.5.15

• Fix regression introduced in 0.5.12 that can lead to a double free when dropping unbounded channel. (#1187)

crossbeam-channel 0.5.14

• Fix stack overflow when sending large value to unbounded channel. (#1146, #1147)
• Add Select::new_biased function. (#1150)
• Remove inefficient spinning. (#1154)
• Suppress buggy clippy::zero_repeat_side_effects lint in macro generated code. (#1123)

Commits

• d35ffde Prepare for the next release
• 6ec74ec crossbeam-channel: prevent double free on Drop (#1187)
• ccd83ac Prepare for the next release
• 54988eb Calculate layout in const context
• 761d0b6 Port #1146 & #1147 to deque::Injector and queue::SegQueue
• 8144fbb Remove optimistic spinning from Context::wait_until
• a92f6c4 Bump peter-evans/create-pull-request from 5 to 7 (#1153)
• 66d41a9 channel: Add new_biased constructor for biased channel selection (#1150)
• d0d0a80 CachePadded: Use 128-byte alignment on arm64ec
• f757eef Add comment about fixed rustc bug
• Additional commits viewable in compare view

Updates keccak from 0.1.5 to 0.1.6

Commits

• a8936d9 keccak v0.1.6
• See full diff in compare view

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