The "Fork me on GitHub" banner is not displayed correctly on the site

[cdouillard]

When I visit the wagon-maven-plugin site, the "Fork me on GitHub" banner is not displayed correctly.

On the other plugins' site, it is displayed correctly :

• flatten-maven-plugin
• license-maven-plugin

[slawekjaranowski]

The plugin was released about 4 year ago ....
I hope that in current master branch it will be ok.

If someone want to work on this plugin I can release next version.