Merge pull request #45156 from quaff

* pr/45156:
  Polish ternary operator

Closes gh-45156

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/Image.java

@@ -91,7 +91,7 @@ public class Image extends MappedObject {
 	 * @return the image OS
 	 */
 	public String getOs() {
-		return (!StringUtils.hasText(this.os)) ? "linux" : this.os;
+		return (StringUtils.hasText(this.os)) ? this.os : "linux";
 	}
 
 	/**