log4j2-docker.xml has a wrong package name for project level logging

The log4j2-docker.xml is generated to contain a wrong project-level logging configuration like this:

    <!-- project logging -->
    <Logger name="org.example" level="info"/>

In other words, instead of using the project package name, it always uses "org.example" there, unlike log4j2-dist.xml or log4j2-dev.xml.

Refs:

• https://code.onehippo.org/cms-community-dev/hippo-project-archetype/blob/release/13.3/main/src/main/resources/archetype-resources/conf/log4j2-docker.xml#L54
• https://code.onehippo.org/cms-community-dev/hippo-project-archetype/blob/release/14.0/main/src/main/resources/archetype-resources/conf/log4j2-docker.xml#L57