Upgrade the asciidoctor documentation dependencies.

Signed-off-by: James R. Perkins <jperkins@redhat.com>

jaxrs-spec/pom.xml

diff --git a/jaxrs-spec/pom.xml b/jaxrs-spec/pom.xml
index 907f42d..f90ed3f 100644
--- a/jaxrs-spec/pom.xml
+++ b/jaxrs-spec/pom.xml
@@ -33,9 +33,7 @@
     <properties>
         <site.output.dir>${project.build.directory}/staging</site.output.dir>
         <maven.site.skip>true</maven.site.skip>
-        <asciidoctorj.version>2.5.1</asciidoctorj.version>
-        <asciidoctorj.pdf.version>1.6.0</asciidoctorj.pdf.version>
-        <jruby.version>9.2.19.0</jruby.version>
+        <jruby.version>9.4.6.0</jruby.version>
         <!-- status: DRAFT, BETA, etc., or blank for final -->
         <status></status>
         <maven.build.timestamp.format>MMMM dd, yyyy</maven.build.timestamp.format>
@@ -49,6 +47,7 @@
             <plugin>
                 <groupId>org.asciidoctor</groupId>
                 <artifactId>asciidoctor-maven-plugin</artifactId>
+                <version>${asciidoctorj.maven.plugin.version}</version>
                 <dependencies>
                     <dependency>
                         <groupId>org.jruby</groupId>

jaxrs-tck-docs/userguide/pom.xml

diff --git a/jaxrs-tck-docs/userguide/pom.xml b/jaxrs-tck-docs/userguide/pom.xml
index 5dd5127..923ccf3 100644
--- a/jaxrs-tck-docs/userguide/pom.xml
+++ b/jaxrs-tck-docs/userguide/pom.xml
@@ -34,10 +34,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <site.output.dir>${project.build.directory}/staging</site.output.dir>
         <maven.site.skip>true</maven.site.skip>
-        <asciidoctorj.version>2.4.2</asciidoctorj.version>
         <asciidoctorj.diagram.version>2.1.0</asciidoctorj.diagram.version>
-        <asciidoctorj.maven.plugin.version>2.1.0</asciidoctorj.maven.plugin.version>
-        <asciidoctorj.pdf.version>1.5.3</asciidoctorj.pdf.version>
         <jbake.maven.plugin.version>0.3.3</jbake.maven.plugin.version>
         <freemarker.version>2.3.30</freemarker.version>
         <!-- status: DRAFT, BETA, etc., or blank for final -->
@@ -137,11 +134,11 @@
                 <configuration>
                     <sourceDirectory>${project.build.directory}/book</sourceDirectory>
                     <sourceDocumentName>book.adoc</sourceDocumentName>
-                    <!-- XXX - below depends on running jbake first -->
-                    <imagesDir>${project.build.directory}/staging/</imagesDir>
                     <backend>pdf</backend>
                     <outputFile>${doc.pdf}</outputFile>
                     <attributes>
+                        <!-- XXX - below depends on running jbake first -->
+                        <imagesdir>${project.build.directory}/staging/</imagesdir>
                         <pdf-stylesdir>${project.basedir}/src/theme</pdf-stylesdir>
                         <pdf-style>jakartaee</pdf-style>
                         <doctype>book</doctype>

pom.xml

diff --git a/pom.xml b/pom.xml
index 7f56703..0854c71 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,6 +109,11 @@
         <com.sun.istack.version>4.1.2</com.sun.istack.version>
         <hamcrest.version>2.2</hamcrest.version>
         <mockito.version>3.6.0</mockito.version>
+
+        <!-- Documentation versions -->
+        <asciidoctorj.maven.plugin.version>3.0.0</asciidoctorj.maven.plugin.version>
+        <asciidoctorj.version>2.5.11</asciidoctorj.version>
+        <asciidoctorj.pdf.version>2.3.13</asciidoctorj.pdf.version>
     </properties>
 
     <modules>