Fix Kotlin example for filtering handler functions

Closes gh-#27337

src/docs/asciidoc/web/webmvc-functional.adoc

@@ -799,12 +799,12 @@ For instance, consider the following example:
 				ServerRequest.from(it)
 						.header("X-RequestHeader", "Value").build()
 			}
+		}
 		POST("/person", handler::createPerson)
 		after { _, response -> // <2>
 			logResponse(response)
 		}
 	}
-	}
 ----
 <1> The `before` filter that adds a custom request header is only applied to the two GET routes.
 <2> The `after` filter that logs the response is applied to all routes, including the nested ones.