Bump crossbeam-utils from 0.6.6 to 0.8.7 in /fuzzer

Bumps [crossbeam-utils](https://github.com/crossbeam-rs/crossbeam) from 0.6.6 to 0.8.7.
- [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-utils-0.6.6...crossbeam-utils-0.8.7)

---
updated-dependencies:
- dependency-name: crossbeam-utils
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

fuzzer/Cargo.toml

@@ -14,7 +14,7 @@ ndarray-stats = "0.2"
 rand = "0.7"
 rand_xoshiro = "0.4"
 num_cpus = "1.10"
-crossbeam-utils = "0.6"
+crossbeam-utils = "0.8"
 libc = "0.2"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"