Update test to align with media type change in HATEOAS 0.24

See gh-10828

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/hateoas/HypermediaAutoConfigurationTests.java

@@ -140,7 +140,8 @@ public class HypermediaAutoConfigurationTests {
 		for (HttpMessageConverter<?> converter : handlerAdapter.getMessageConverters()) {
 			if (converter instanceof TypeConstrainedMappingJackson2HttpMessageConverter) {
 				assertThat(converter.getSupportedMediaTypes())
-						.containsExactly(MediaTypes.HAL_JSON);
+						.containsExactly(MediaTypes.HAL_JSON, MediaType.parseMediaType(
+								MediaTypes.HAL_JSON_VALUE + ";charset=UTF-8"));
 			}
 		}
 	}