fix(deps): update rust crate indexmap to 2.9.0

[nextest-bot]

This PR contains the following updates:

Package	Type	Update	Change
indexmap	dependencies	minor	2.7.1 -> 2.9.0

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Release Notes

indexmap-rs/indexmap (indexmap)

v2.9.0

Compare Source

• Added a get_disjoint_mut method to IndexMap, matching Rust 1.86's
  HashMap method.
• Added a get_disjoint_indices_mut method to IndexMap and map::Slice,
  matching Rust 1.86's get_disjoint_mut method on slices.
• Deprecated the borsh feature in favor of their own indexmap feature,
  solving a cyclic dependency that occured via borsh-derive.

v2.8.0

Compare Source

• Added indexmap_with_default! and indexset_with_default! to be used with
  alternative hashers, especially when using the crate without std.
• Implemented PartialEq between each Slice and []/arrays.
• Removed the internal rustc-rayon feature and dependency.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.61%. Comparing base (2bf97e2) to head (4e9d6e5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #336   +/-   ##
=======================================
  Coverage   79.61%   79.61%           
=======================================
  Files           4        4           
  Lines         682      682           
=======================================
  Hits          543      543           
  Misses        139      139           

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