refactor(HelloController): simplify collection conversion

src/main/java/de/szut/lf8_starter/hello/HelloController.java

@@ -94,6 +94,6 @@ public class HelloController {
                 .findByMessage(message)
                 .stream()
                 .map(e -> this.helloMapper.mapToGetDto(e))
-                .collect(Collectors.toList());
+                .toList();
     }
 }