deps: bump indexmap from 2.7.1 to 2.8.0

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
...

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

Author: dependabot[bot]

Cargo.lock

@@ -39,7 +39,7 @@ getrandom = { version = "0.2.15" }
 hickory-resolver = "0.25.0-alpha.5"
 hkdf = "0.12.4"
 idb = "0.6.4"
-indexmap = "2.7.1"
+indexmap = "2.8.0"
 ipld-core = { version = "0.4.1", features = ["serde"] }
 ipld-dagpb = "0.2.1"
 libp2p = { version = "0.55.0" }