Merge pull request scala#2311 from kori73/fix-typo

fix typo in object method call

Author: Philippus

_overviews/scala3-book/domain-modeling-tools.md

@@ -224,7 +224,7 @@ object StringUtils:
 
 We can use the object as follows:
 ```scala
-StringUtil.truncate("Chuck Bartowski", 5)  // "Chuck"
+StringUtils.truncate("Chuck Bartowski", 5)  // "Chuck"
 ```
 
 Importing in Scala is very flexible, and allows us to import _all_ members of an object: