build: bump indexmap from 2.0.2 to 2.1.0

Bumps [indexmap](https://github.com/bluss/indexmap) from 2.0.2 to 2.1.0.
- [Changelog](https://github.com/bluss/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.0.2...2.1.0)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -70,7 +70,7 @@ git-branchless-test = { version = "0.8.0", path = "git-branchless-test" }
 git-branchless-undo = { version = "0.8.0", path = "git-branchless-undo" }
 git2 = { version = "0.17.2", default-features = false }
 glob = "0.3.0"
-indexmap = "2.0.2"
+indexmap = "2.1.0"
 indicatif = { version = "0.17.7", features = ["improved_unicode"] }
 itertools = "0.11.0"
 lalrpop = "0.19.12"