Polish "Support lower-case input in DurationStyle"

See gh-32223

Author: wilkinsona

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/DurationStyle.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,7 @@
  * Duration format styles.
  *
  * @author Phillip Webb
+ * @author Valentine Wu
  * @since 2.0.0
  */
 public enum DurationStyle {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/DurationStyleTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +28,7 @@
  * Tests for {@link DurationStyle}.
  *
  * @author Phillip Webb
+ * @author Valentine Wu
  */
 class DurationStyleTests {