Update help-artifacts.html
<div>
You can use wildcards like 'module/dist/**/*.zip'.
See <a href='http://ant.apache.org/manual/Types/fileset.html'>
- the includes attribute of Ant fileset</a> for the exact format.
+ the includes attribute of Ant fileset</a> for the exact format
+ (except that space is not supported as a separator).
The base directory is <a href='ws/'>the workspace</a>.
You can only archive files that are located in your workspace.
</div>
