Bump crossbeam from 0.8.3 to 0.8.4

Bumps [crossbeam](https://github.com/crossbeam-rs/crossbeam) from 0.8.3 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-0.8.3...crossbeam-0.8.4)

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

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

Cargo.toml

@@ -22,7 +22,7 @@ strip = true
 [dependencies]
 clap = { version = "4.4.14", features = ["derive"] }
 cmarkfmt = { version = "0.1.2" }
-crossbeam = { version = "0.8.3" }
+crossbeam = { version = "0.8.4" }
 diffy = { version = "0.3.0" }
 fastrand = { version = "2.0.1" }
 fjson = { version = "0.3.1" }