Upgrade to SnakeYAML 1.23

Closes gh-14224

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -152,7 +152,7 @@
 		<sendgrid.version>4.2.1</sendgrid.version>
 		<servlet-api.version>4.0.1</servlet-api.version>
 		<slf4j.version>1.7.25</slf4j.version>
-		<snakeyaml.version>1.21</snakeyaml.version>
+		<snakeyaml.version>1.23</snakeyaml.version>
 		<solr.version>7.4.0</solr.version>
 		<spring.version>5.1.0.BUILD-SNAPSHOT</spring.version>
 		<spring-amqp.version>2.1.0.M2</spring-amqp.version>

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/OriginTrackedYamlLoader.java

@@ -124,7 +124,7 @@ class OriginTrackedYamlLoader extends YamlProcessor {
 
 		KeyScalarNode(ScalarNode node) {
 			super(node.getTag(), node.getValue(), node.getStartMark(), node.getEndMark(),
-					node.getStyle());
+					node.getScalarStyle());
 		}
 
 		public static NodeTuple get(NodeTuple nodeTuple) {