Bump crossbeam from 0.8.2 to 0.8.4

Bumps [crossbeam](https://github.com/crossbeam-rs/crossbeam) from 0.8.2 to 0.8.4.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](crossbeam-rs/crossbeam@crossbeam-0.8.2...crossbeam-0.8.4)

---
updated-dependencies:
- dependency-name: crossbeam
  dependency-version: 0.8.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -7,7 +7,7 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-crossbeam = "0.8.0"
+crossbeam = "0.8.4"
 rand = "0.8.4"
 num_cpus = "1.14.0"
 sha2 = "0.10"

examples/mem-correctness-test/Cargo.toml

@@ -34,7 +34,7 @@ lazy_static = "1.5.0"                             # MIT/Apache-2.0
 libc = "0.2.48"                                   # MIT/Apache-2.0
 nix = "0.13.0"                                    # MIT
 openssl = { version = "0.10", optional = true }   # Apache-2.0
-crossbeam = "0.8.2"                               # MIT/Apache-2.0
+crossbeam = "0.8.4"                               # MIT/Apache-2.0
 num_cpus = "1.10.0"                               # MIT/Apache-2.0
 tokio = { version = "1.35", features = ["full"] } # MIT
 futures = { version = "0.3", features = ["compat", "io-compat"] } # MIT/Apache-2.0