Bump rand from 0.8.4 to 0.8.5 in /rust

[dependabot[bot]]

Bumps rand from 0.8.4 to 0.8.5.

Changelog

Sourced from rand's changelog.

[0.8.5] - 2021-08-20

Fixes

• Fix build on non-32/64-bit architectures (#1144)
• Fix "min_const_gen" feature for no_std (#1173)
• Check libc::pthread_atfork return value with panic on error (#1178)
• More robust reseeding in case ReseedingRng is used from a fork handler (#1178)
• Fix nightly: remove unused slice_partition_at_index feature (#1215)
• Fix nightly + simd_support: update packed_simd (#1216)

Rngs

• StdRng: Switch from HC128 to ChaCha12 on emscripten (#1142). We now use ChaCha12 on all platforms.

Documentation

• Added docs about rand's use of const generics (#1150)
• Better random chars example (#1157)

Commits

• 937320c Update CHANGELOG for 0.8.5 (#1221)
• 2924af6 Merge pull request #1183 from vks/fill-float-doc
• dbbc1bf Merge pull request #1218 from Will-Low/master
• 9f20df0 Making distributions comparable by deriving PartialEq. Tests included
• a407bdf Merge pull request #1216 from rust-random/work5
• d3ca11b Update to packed_simd_2 0.3.7
• fa04c15 Merge pull request #1215 from Lantern-chat/master
• 73f8ffd Remove unused slice_partition_at_index feature
• 8f37250 Merge pull request #1208 from newpavlov/rand_distr/fix_no_std
• 9ef737b update changelog
• Additional commits viewable in compare view

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