Update rustc-hash requirement from =2.1.0 to =2.1.1

Updates the requirements on [rustc-hash](https://github.com/rust-lang/rustc-hash) to permit the latest version.
- [Changelog](https://github.com/rust-lang/rustc-hash/blob/master/CHANGELOG.md)
- [Commits](rust-lang/rustc-hash@v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: rustc-hash
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -41,7 +41,7 @@ hexlit = "0.5.5"
 criterion = "0.5.1"
 alloc_counter = "0.0.4"
 trybuild = "1.0.99"
-rustc-hash = "=2.1.0"
+rustc-hash = "=2.1.1"
 env_logger = "0.11.5"
 assert_hex = "0.4.1"