Fix typo

Closes gh-7127

Author: herau

spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -1466,7 +1466,7 @@ By default, `spring-boot-starter-thymeleaf` uses Thymeleaf 2.1. If you are using
 	<properties>
 		<thymeleaf.version>3.0.0.RELEASE</thymeleaf.version>
 		<thymeleaf-layout-dialect.version>2.0.3</thymeleaf-layout-dialect.version>
-	</dependency>
+	</properties>
 ----
 
 NOTE: if you are managing dependencies yourself, look at `spring-boot-dependencies` for