Disable flaky test

Author: fmbenhassine

spring-batch-samples/src/test/java/org/springframework/batch/samples/loom/VirtualThreadsSupportFunctionalTests.java

@@ -16,6 +16,7 @@
 package org.springframework.batch.samples.loom;
 
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledForJreRange;
 import org.junit.jupiter.api.condition.JRE;
@@ -113,6 +114,7 @@ public void testConcurrentStepsWithVirtualThreads() throws Exception {
 
 	}
 
+	@Disabled("This test is flaky on CI")
 	@Test
 	public void testParallelStepsWithVirtualThreads() throws Exception {
 		// given