Upgrade to AsciidoctorJ PDF 2.3.3

Closes gh-873

Author: wilkinsona

spring-restdocs-platform/build.gradle

@@ -16,7 +16,7 @@ dependencies {
 		api("org.apache.tomcat.embed:tomcat-embed-core:10.1.1")
 		api("org.apache.tomcat.embed:tomcat-embed-el:10.1.1")
 		api("org.asciidoctor:asciidoctorj:2.5.7")
-		api("org.asciidoctor:asciidoctorj-pdf:2.3.0")
+		api("org.asciidoctor:asciidoctorj-pdf:2.3.3")
 		api("org.assertj:assertj-core:3.23.1")
 		api("org.hamcrest:hamcrest-core:1.3")
 		api("org.hamcrest:hamcrest-library:1.3")