Update plugin org.asciidoctor.jvm.convert to v4.0.4

Author: renovate[bot]

settings.gradle

@@ -9,7 +9,7 @@ pluginManagement {
   plugins {
     id "com.gradle.develocity" version "3.19"
     id "com.gradle.common-custom-user-data-gradle-plugin" version "2.0.2"
-    id "org.asciidoctor.jvm.convert" version "4.0.3"
+    id "org.asciidoctor.jvm.convert" version "4.0.4"
     id "net.nemerosa.versioning" version "3.1.0"
     id "io.github.gradle-nexus.publish-plugin" version "2.0.0"
     id "com.github.ben-manes.versions" version "0.51.0"