Merge pull request #377 from rabbitmq/dependabot/maven/org.asciidoctor-asciidoctorj-pdf-2.3.9

Bump asciidoctorj-pdf from 2.3.7 to 2.3.9

Author: acogoluegnes

pom.xml

@@ -87,7 +87,7 @@
     <build-helper-maven-plugin.version>3.4.0</build-helper-maven-plugin.version>
     <asciidoctor.maven.plugin.version>2.2.4</asciidoctor.maven.plugin.version>
     <asciidoctorj.version>2.5.10</asciidoctorj.version>
-    <asciidoctorj.pdf.version>2.3.7</asciidoctorj.pdf.version>
+    <asciidoctorj.pdf.version>2.3.9</asciidoctorj.pdf.version>
     <asciidoctorj.diagram.version>2.2.9</asciidoctorj.diagram.version>
     <buildnumber.plugin.version>1.4</buildnumber.plugin.version>
     <jmh.version>1.36</jmh.version>