Bump indexmap from 2.11.4 to 2.12.0

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.11.4 to 2.12.0.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/main/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.11.4...2.12.0)

---
updated-dependencies:
- dependency-name: indexmap
  dependency-version: 2.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -27,7 +27,7 @@ chrono = "0.4"
 clap = {version = "4.5.48", features = ["cargo", "derive"]}
 include_dir = "0.7.4"
 highs = "1.12.0"
-indexmap = "2.11.0"
+indexmap = "2.12.0"
 human-panic = "2.0.3"
 clap-markdown = "0.1.5"
 platform-info = "2.0.5"