build(deps): bump indexmap from 1.9.2 to 2.1.0

Bumps [indexmap](https://github.com/bluss/indexmap) from 1.9.2 to 2.1.0.
- [Changelog](https://github.com/bluss/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@1.9.2...2.1.0)

---
updated-dependencies:
- dependency-name: indexmap
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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