fix(typescript): fix template lineral type definition (#4474)

src/data/roadmaps/typescript/content/112-advanced-types/103-template-literal-types.md

@@ -5,7 +5,7 @@ Template literal types in TypeScript are a way to manipulate string values as ty
 For example, the following is a template literal type that concatenates two strings:
 
 ```typescript
-type Name = `Mr. ` + string;
+type Name = `Mr. ${string}`;
 
 let name: Name = `Mr. Smith`;  // ok
 let name: Name = `Mrs. Smith`;  // error