Fix PropertiesMigrationListenerTests

See gh-21104

Author: dreis2211

spring-boot-project/spring-boot-properties-migrator/src/test/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationListenerTests.java

@@ -47,8 +47,8 @@ void closeContext() {
 
 	@Test
 	void sampleReport(CapturedOutput output) {
-		this.context = createSampleApplication().run("--banner.charset=UTF8");
-		assertThat(output).contains("commandLineArgs").contains("spring.banner.charset")
+		this.context = createSampleApplication().run("--logging.file=test.log");
+		assertThat(output).contains("commandLineArgs").contains("logging.file.name")
 				.contains("Each configuration key has been temporarily mapped")
 				.doesNotContain("Please refer to the migration guide");
 	}