chore(deps): update rust crate indexmap to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
indexmap	dependencies	major	1.9 -> 2.1

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Release Notes

bluss/indexmap (indexmap)

### [`v2.1.0`](https://togithub.com/bluss/indexmap/compare/2.0.2...2.1.0) [Compare Source](https://togithub.com/bluss/indexmap/compare/2.0.2...2.1.0) ### [`v2.0.2`](https://togithub.com/bluss/indexmap/compare/2.0.1...2.0.2) [Compare Source](https://togithub.com/bluss/indexmap/compare/2.0.1...2.0.2) ### [`v2.0.1`](https://togithub.com/bluss/indexmap/compare/2.0.0...2.0.1) [Compare Source](https://togithub.com/bluss/indexmap/compare/2.0.0...2.0.1) ### [`v2.0.0`](https://togithub.com/bluss/indexmap/compare/1.9.3...2.0.0) [Compare Source](https://togithub.com/bluss/indexmap/compare/1.9.3...2.0.0) ### [`v1.9.3`](https://togithub.com/bluss/indexmap/compare/1.9.2...1.9.3) [Compare Source](https://togithub.com/bluss/indexmap/compare/1.9.2...1.9.3) ### [`v1.9.2`](https://togithub.com/bluss/indexmap/compare/1.9.1...1.9.2) [Compare Source](https://togithub.com/bluss/indexmap/compare/1.9.1...1.9.2) ### [`v1.9.1`](https://togithub.com/bluss/indexmap/compare/1.9.0...1.9.1) [Compare Source](https://togithub.com/bluss/indexmap/compare/1.9.0...1.9.1)

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