deps: Specify tested minor version of rustc-hash dependency

Author: alerque

Cargo.toml

@@ -37,7 +37,7 @@ futures = "0.3"
 iai = "0.1"
 intl_pluralrules = "7.0"
 once_cell = "1.21"
-rustc-hash = "2"
+rustc-hash = "2.1"
 serde = "1.0"
 serde_json = "1.0"
 thiserror = "2.0"