Upgrade to asciidoctor plugins 4.0.5

Closes gh-1688

Author: snicoll

spring-ws-docs/build.gradle

@@ -16,8 +16,8 @@
 
 plugins {
 	id "io.freefair.aggregate-javadoc" version "8.12.1"
-	id "org.asciidoctor.jvm.convert" version "4.0.4"
-	id "org.asciidoctor.jvm.pdf" version "4.0.4"
+	id "org.asciidoctor.jvm.convert" version "4.0.5"
+	id "org.asciidoctor.jvm.pdf" version "4.0.5"
 	id "maven-publish"
 	id "org.springframework.ws.conventions"
 }