chore: update book to Rust edition 2024

DanielleHuisman · DanielleHuisman · commit 0e0322ef3f35 · 2025-04-05T14:14:24.000+02:00
diff --git a/book/book.toml b/book/book.toml
@@ -14,4 +14,4 @@ edit-url-template = "https://github.com/RustForWeb/shield/edit/main/book/{path}"
 git-repository-url = "https://github.com/RustForWeb/shield"
 
 [rust]
-edition = "2021"
+edition = "2024"
