build(deps): bump indexmap from 2.8.0 to 2.9.0 (#250)

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.8.0 to 2.9.0.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/main/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.8.0...2.9.0)

---
updated-dependencies:
- dependency-name: indexmap
  dependency-version: 2.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -29,7 +29,7 @@ env_logger = "0.11.7"
 url = "2.5.4"
 rust-embed = { version = "8.6.0", features = ["interpolate-folder-path"] }
 lazy_static = "1.5.0"
-indexmap = { version = "2.8.0", features = ["serde"] }
+indexmap = { version = "2.9.0", features = ["serde"] }
 rss = "2.0.12"
 rayon = "1.10.0"