Merge pull request #336 from rabbitmq/dependabot/maven/org.asciidoctor-asciidoctorj-diagram-2.2.8

Bump asciidoctorj-diagram from 2.2.7 to 2.2.8

Author: acogoluegnes

pom.xml

@@ -88,7 +88,7 @@
     <asciidoctor.maven.plugin.version>2.2.3</asciidoctor.maven.plugin.version>
     <asciidoctorj.version>2.5.8</asciidoctorj.version>
     <asciidoctorj.pdf.version>2.3.7</asciidoctorj.pdf.version>
-    <asciidoctorj.diagram.version>2.2.7</asciidoctorj.diagram.version>
+    <asciidoctorj.diagram.version>2.2.8</asciidoctorj.diagram.version>
     <buildnumber.plugin.version>1.4</buildnumber.plugin.version>
     <jmh.version>1.36</jmh.version>
     <spotless.version>2.36.0</spotless.version>