Update maven site plugin to use new doxia version for publishing

Author: jjlauer

pom.xml

@@ -196,7 +196,7 @@
  <dependency>
  <groupId>org.apache.maven.doxia</groupId>
  <artifactId>doxia-module-markdown</artifactId>
- <version>1.8</version>
+ <version>1.12.0</version>
  </dependency>
  </dependencies>
  </plugin>