Update Rust crate indexmap to v2.8.0 (#10803)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Cargo.lock

@@ -91,7 +91,7 @@ futures-util = "=0.3.31"
 hex = "=0.4.3"
 http = "=1.2.0"
 hyper = { version = "=1.6.0", features = ["client", "http1"] }
-indexmap = { version = "=2.7.1", features = ["serde"] }
+indexmap = { version = "=2.8.0", features = ["serde"] }
 indicatif = "=0.17.11"
 ipnetwork = "=0.21.1"
 json-subscriber = "=0.2.4"