Bump rand from 0.8.5 to 0.8.6 in /library/stdarch#8

dependabot[bot] wants to merge 1 commit intomainruntimeverification/verify-rust-std:mainfrom

dependabot/cargo/library/stdarch/rand-0.8.6runtimeverification/verify-rust-std:dependabot/cargo/library/stdarch/rand-0.8.6Copy head branch name to clipboard