[Typo3-doc] OPL link need to be changed

[Sylvain Viart]

Hi,

On the page http://wiki.typo3.org/index.php/Typo3Wiki:About

The link on the OPL should be:

[http://www.opencontent.org/opl.shtml Open Content License]

-- 
Cordialement,
Sylvain.
France