Bump indexmap from 2.2.5 to 2.2.6

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.2.5 to 2.2.6.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.2.5...2.2.6)

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

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

Cargo.toml

@@ -14,7 +14,7 @@ license = "Apache-2.0"
 #
 # Each crate can add on specific features freely as it inherits.
 [workspace.dependencies]
-indexmap.version = "2.2.5"
+indexmap.version = "2.2.6"
 hashbrown.version = "0.14.0"
 # This doesn't set `extension-module` as a shared feature because we need to be able to disable it
 # during Rust-only testing (see # https://github.com/PyO3/pyo3/issues/340).