build: Bump signal-hook-registry from 1.4.2 to 1.4.6

Bumps [signal-hook-registry](https://github.com/vorner/signal-hook) from 1.4.2 to 1.4.6.
- [Changelog](https://github.com/vorner/signal-hook/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vorner/signal-hook/compare/registry-v1.4.2...registry-v1.4.6)

---
updated-dependencies:
- dependency-name: signal-hook-registry
  dependency-version: 1.4.6
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -1968,9 +1968,9 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.2"
+version = "1.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
+checksum = "b2a4719bff48cee6b39d12c020eeb490953ad2443b7055bd0b21fca26bd8c28b"
 dependencies = [
  "libc",
 ]