Fix the test title for SingleTestClassLoader.

src/test/groovy/space/kklochko/simple_jbdd/tests/loaders/IntegratedSingleClassLoader.groovy

@@ -9,7 +9,7 @@ import spock.lang.Title
 @Narrative("""The loader must return a class or null, so
 those tests check if responses are right.
 """)
-@Title("Integrated tests for ClassLoader.")
+@Title("Integrated tests for SingleClassLoader.")
 class IntegratedSingleClassLoader extends Specification {
     def "The class has been loaded."() {
         given: "I have a class loader"