chore(deps): bump indexmap from 2.7.1 to 2.8.0 (#15333)

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.7.1 to 2.8.0.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/main/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.7.1...2.8.0)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -142,7 +142,7 @@ env_logger = "0.11"
 futures = "0.3"
 half = { version = "2.5.0", default-features = false }
 hashbrown = { version = "0.14.5", features = ["raw"] }
-indexmap = "2.7.1"
+indexmap = "2.8.0"
 itertools = "0.14"
 log = "^0.4"
 object_store = { version = "0.11.0", default-features = false }