Use Java 17 formatted string in test

Author: MarkEWaite

src/test/java/jenkins/advancedqueue/test/DeclarativePipelineTest.java

@@ -107,7 +107,7 @@ void test_declarative_pipeline_default_null() throws Exception {
     private WorkflowJob createPipelineJob(String jobName, String script, String jobGroupName)
             throws FormException, IOException {
         WorkflowJob job = j.jenkins.createProject(WorkflowJob.class, jobName);
-        job.setDefinition(new CpsFlowDefinition(String.format(script, jobGroupName), true));
+        job.setDefinition(new CpsFlowDefinition(script.formatted(jobGroupName), true));
         return job;
     }
 }