chore(deps): bump indexmap from 2.10.0 to 2.12.0

[dependabot]

Bumps indexmap from 2.10.0 to 2.12.0.

Changelog

Sourced from indexmap's changelog.

2.12.0 (2025-10-17)

• MSRV: Rust 1.82.0 or later is now required.
• Updated the hashbrown dependency to 0.16 alone.
• Error types now implement core::error::Error.
• Added pop_if methods to IndexMap and IndexSet, similar to the method for Vec added in Rust 1.86.

2.11.4 (2025-09-18)

• Updated the hashbrown dependency to a range allowing 0.15 or 0.16.

2.11.3 (2025-09-15)

• Make the minimum serde version only apply when "serde" is enabled.

2.11.2 (2025-09-15)

• Switched the "serde" feature to depend on serde_core, improving build parallelism in cases where other dependents have enabled "serde/derive".

2.11.1 (2025-09-08)

• Added a get_key_value_mut method to IndexMap.
• Removed the unnecessary Ord bound on insert_sorted_by methods.

2.11.0 (2025-08-22)

• Added insert_sorted_by and insert_sorted_by_key methods to IndexMap, IndexSet, and VacantEntry, like customizable versions of insert_sorted.
• Added is_sorted, is_sorted_by, and is_sorted_by_key methods to IndexMap and IndexSet, as well as their Slice counterparts.
• Added sort_by_key and sort_unstable_by_key methods to IndexMap and IndexSet, as well as parallel counterparts.
• Added replace_index methods to IndexMap, IndexSet, and VacantEntry to replace the key (or set value) at a given index.
• Added optional sval serialization support.

Commits

• 0e68f8a Merge pull request #422 from cuviper/msrv-1.82
• 61c9c94 ci: only run full miri in the merge queue
• db43f19 Release 2.12.0
• b46a32a Move more to the lints table
• 4849b16 Make use of RFC2145 type privacy for sealed traits
• cfff4b7 Use bounds in associated type position
• c7178d7 Use core::error::Error
• 76b459b Use more precise capturing for some impl Trait
• b3d9cc3 Use the primitive slice's is_sorted methods
• 09db3cc Use inherent usize::div_ceil
• Additional commits viewable in compare view

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[dependabot]

Looks like indexmap is up-to-date now, so this is no longer needed.