Update link to Dart built-in types documentation (#9319)

src/data/roadmaps/flutter/content/built-in-types@TT6HoilzgmS8CAPiTTKZ0.md

@@ -4,5 +4,5 @@ There are several built-in data types, including int, double, String, bool, List
 
 Visit the following resources to learn more:
 
-- [@official@Built-in types](https://dart.dev/guides/language/language-tour#built-in-types)
+- [@official@Built-in types](https://dart.dev/language/built-in-types)
 - [@official@Overview of Built-in Types](https://dart.dev/guides/language/coming-from/js-to-dart#built-in-types)