build(deps): bump indexmap from 2.2.6 to 2.4.0

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.2.6 to 2.4.0.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.2.6...2.4.0)

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

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

Cargo.toml

@@ -21,7 +21,7 @@ fastobo = "0.15.2"
 fastrand = "2.1"
 flate2 = "1.0"
 hpo = "0.8"
-indexmap = { version = "2.2", features = ["serde"] }
+indexmap = { version = "2.4", features = ["serde"] }
 indicatif = { version = "0.17", features = ["rayon"] }
 itertools = "0.13"
 lazy_static = "1.5"