Migrate from ExpectedException rule to AssertJ

Replace ExpectedException JUnit rules with AssertJ exception
assertions.

Closes gh-14336

spring-boot-samples/spring-boot-sample-jooq/gensrc/main/java/sample/jooq/domain/Book.java

@@ -140,4 +140,5 @@ public class Book extends TableImpl<Record> {
 	public Book rename(String name) {
 		return new Book(name, null);
 	}
+
 }