Make use of JavaExecSpec.getJvmArguments()

Closes gh-34413

build-plugin/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/ApplicationPluginAction.java

@@ -72,8 +72,8 @@ final class ApplicationPluginAction implements PluginApplicationAction {
 	private void applyApplicationDefaultJvmArgsToRunTask(TaskContainer tasks, JavaApplication javaApplication,
 			String taskName) {
 		tasks.named(taskName, BootRun.class)
-			.configure((bootRun) -> bootRun.getConventionMapping()
+			.configure(
-				.map("jvmArgs", javaApplication::getApplicationDefaultJvmArgs));
+					(bootRun) -> bootRun.getJvmArguments().convention(javaApplication.getApplicationDefaultJvmArgs()));
 	}
 
 	private void configureCreateStartScripts(Project project, JavaApplication javaApplication,