chore: update the root Cargo.toml and set the edition field to the 2024 edition

Author: dlachaume

Cargo.toml

@@ -40,7 +40,7 @@ members = [
 [workspace.package]
 authors = ["[email protected]", "[email protected]"]
 documentation = "https://mithril.network/doc"
-edition = "2021"
+edition = "2024"
 homepage = "https://mithril.network"
 license = "Apache-2.0"
 repository = "https://github.com/input-output-hk/mithril/"