plugin-info.html should contain a better Usage section

The usage section in the page "plugin-info.html" being generated by the report goal of the maven-plugin-plugin contains the version information of the plugin in both sections pluginManagement as well as plugins. I think it is best practice to only give out the version in the pluginManagement. Therefore please remove the version from the plugins section.

One example for that can be seen in https://maven.apache.org/plugins/maven-compiler-plugin/plugin-info.html.