Upgrade to Thymeleaf Layout Dialect 2.3.0

Closes gh-12048

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

@@ -162,7 +162,7 @@
 		<sun-mail.version>${javax-mail.version}</sun-mail.version>
 		<thymeleaf.version>3.0.9.RELEASE</thymeleaf.version>
 		<thymeleaf-extras-springsecurity4.version>3.0.2.RELEASE</thymeleaf-extras-springsecurity4.version>
-		<thymeleaf-layout-dialect.version>2.2.2</thymeleaf-layout-dialect.version>
+		<thymeleaf-layout-dialect.version>2.3.0</thymeleaf-layout-dialect.version>
 		<thymeleaf-extras-data-attribute.version>2.0.1</thymeleaf-extras-data-attribute.version>
 		<thymeleaf-extras-java8time.version>3.0.1.RELEASE</thymeleaf-extras-java8time.version>
 		<tomcat.version>8.5.28</tomcat.version>