Bump org.asciidoctor:asciidoctor-maven-plugin from 2.2.5 to 2.2.6 (#1219

)

Co-authored-by: Boni Garcia <boni.garcia@uc3m.es>

pom.xml

@@ -33,7 +33,7 @@
         <maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
         <exec-maven-plugin.version>3.1.1</exec-maven-plugin.version>
         <maven-jar-plugin.version>3.3.0</maven-jar-plugin.version>
-        <maven-asciidoctor-plugin.version>2.2.5</maven-asciidoctor-plugin.version>
+        <maven-asciidoctor-plugin.version>2.2.6</maven-asciidoctor-plugin.version>
         <asciidoctorj-pdf.version>2.3.10</asciidoctorj-pdf.version>
         <maven-site.version>3.12.1</maven-site.version>
         <maven-project-info-reports.version>3.5.0</maven-project-info-reports.version>