Add custom rule usage to README.md

README.md

@@ -21,7 +21,7 @@ The `${taikai.version}` property should be defined as a property in your Maven p
 JUnit 5 Example test
 -------------------
 
-```java
+```
 @Test
 void shouldFulfilConstrains() {
   Taikai.builder()
@@ -62,6 +62,7 @@ void shouldFulfilConstrains() {
           .naming(naming -> naming
               .classesShouldNotMatch(".*Impl")
               .interfacesShouldNotHavePrefixI()))
+      .addRule(TaikaiRule.of(...)) //add custom ArchUnit here
       .build()
       .check();
 }