Bump org.apache.maven.plugins:maven-javadoc-plugin from 3.6.3 to 3.12.0 in /plugins/maven/graphql-java-codegen-maven-plugin

Bump org.apache.maven.plugins:maven-javadoc-plugin from 3.6.3 to 3.12.0 in /plugins/maven/graphql-java-codegen-maven-plugin #2854