build: bump indexmap from 2.1.0 to 2.2.1

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.1.0 to 2.2.1.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.1.0...2.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -71,7 +71,7 @@ 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 = "2.1.0"
+indexmap = "2.2.1"
 indicatif = { version = "0.17.7", features = ["improved_unicode"] }
 itertools = "0.12.0"
 lalrpop = "0.19.12"