Require ignore 0.4.24 in Cargo.toml (#21292)

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## Summary

<!-- What's the purpose of the change? What does it do, and why? -->
Since 4c4ddc8c29, ruff uses the `WalkBuilder::current_dir` API
[introduced in `ignore` version
0.4.24](https://diff.rs/ignore/0.4.23/0.4.24/src%2Fwalk.rs), so it
should explicitly depend on this minimum version.

See also https://github.com/astral-sh/ruff/pull/20979.

## Test Plan

<!-- How was it tested? -->
Source inspection verifies this version is necessary; no additional
testing is required since `Cargo.lock` already has (at least) this
version.

Cargo.toml

@@ -103,7 +103,7 @@ hashbrown = { version = "0.16.0", default-features = false, features = [
     "inline-more",
 ] }
 heck = "0.5.0"
-ignore = { version = "0.4.22" }
+ignore = { version = "0.4.24" }
 imara-diff = { version = "0.1.5" }
 imperative = { version = "1.0.4" }
 indexmap = { version = "2.6.0" }