Changes in docs

Author: mondeja

book/src/languages.md

@@ -20,14 +20,14 @@ compile time:
 ```rust
 let LANGUAGES = [
   leptos_fluent::Language {
-    id: unic_langid::langid!("en"),
+    id: "en",
     name: "English",
     dir: leptos_fluent::WritingDirection::Ltr,
     flag: Some("🇬🇧"),
     script: None,
   },
   leptos_fluent::Language {
-    id: unic_langid::langid!("es-ES"),
+    id: "es-ES",
     name: "Español (España)",
     dir: leptos_fluent::WritingDirection::Ltr,
     flag: Some("🇪🇸"),