Update itertools requirement from 0.11.0 to 0.12.0 in /object_store

Updates the requirements on [itertools](https://github.com/rust-itertools/itertools) to permit the latest version.
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](rust-itertools/itertools@v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: itertools
  dependency-type: direct:production
...

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

object_store/Cargo.toml

@@ -35,7 +35,7 @@ bytes = "1.0"
 chrono = { version = "0.4.31", default-features = false, features = ["clock"] }
 futures = "0.3"
 humantime = "2.1"
-itertools = "0.11.0"
+itertools = "0.12.0"
 parking_lot = { version = "0.12" }
 percent-encoding = "2.1"
 snafu = "0.7"