Attempt to fix CI

Author: philwebb

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java

@@ -924,7 +924,7 @@ void portClashOfSecondaryConnectorResultsInPortInUseException() throws Exception
 	@Test
 	void malformedAddress() throws Exception {
 		AbstractServletWebServerFactory factory = getFactory();
-		factory.setAddress(InetAddress.getByName("123456"));
+		factory.setAddress(InetAddress.getByName("255.255.255.255"));
 		assertThatExceptionOfType(RuntimeException.class).isThrownBy(() -> {
 			this.webServer = factory.getWebServer();
 			this.webServer.start();