chore: bump signal-hook from 0.1.15 to 0.2.3 (#17827)

Bumps [signal-hook](https://github.com/vorner/signal-hook) from 0.1.15 to 0.2.3.
- [Release notes](https://github.com/vorner/signal-hook/releases)
- [Changelog](https://github.com/vorner/signal-hook/blob/v0.2.3/CHANGELOG.md)
- [Commits](https://github.com/vorner/signal-hook/compare/v0.1.15...v0.2.3)

---
updated-dependencies:
- dependency-name: signal-hook
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

validator/Cargo.toml

@@ -51,7 +51,7 @@ symlink = "0.1.0"
 
 [target."cfg(unix)".dependencies]
 libc = "0.2.81"
-signal-hook = "0.1.15"
+signal-hook = "0.2.3"
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]