build(deps): Update Rust crate signal-hook to 0.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
signal-hook	dependencies	minor	0.3 -> 0.4

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Release Notes

vorner/signal-hook (signal-hook)

v0.4.1

Compare Source

• Don't pin specific dependency versions accidentally.

v0.4.0

Compare Source

• Changed the low_level::pipe to look OwnedFd instead of IntoRawFd, to
  enforce ownership of the file descriptor (#​196).

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --package signal-hook@0.3.18 --precise 0.4.1
    Updating crates.io index
error: failed to select a version for the requirement `signal-hook = "^0.3.17"`
candidate versions found which didn't match: 0.4.1
location searched: crates.io index
required by package `crossterm v0.29.0`
    ... which satisfies dependency `crossterm = "^0.29"` of package `timer-cli v0.11.0 (/tmp/renovate/repos/github/pando85/timer)`