Bump signal-hook from 0.3.17 to 0.4.3 (#333)

Bumps [signal-hook](https://github.com/vorner/signal-hook) from 0.3.17 to 0.4.3.
- [Changelog](https://github.com/vorner/signal-hook/blob/master/CHANGELOG.md)
- [Commits](vorner/signal-hook@v0.3.17...v0.4.3)

---
updated-dependencies:
- dependency-name: signal-hook
  dependency-version: 0.4.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -48,7 +48,7 @@ reqwest = { version = "0.12", default-features = false, features = ["json", "rus
 schemars = { version = "0.8", features = ["chrono", "uuid1", "bigdecimal"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-signal-hook = "0.3"
+signal-hook = "0.4"
 slog = "2.8.2"
 slog-async = "2.7.0"
 slog-json = "2.6.1"