[BUGFIX] License Links in about module are incorrect

The about module links to "http://typo3.org/license" (404) instead of
"http://typo3.org/typo3-cms/overview/licenses/". The links are correct now.

Resolves: #68787
Releases: master
Change-Id: Id65f7bd028ad3b2ed555683c2b7f92cd2693670c
Reviewed-on: http://review.typo3.org/42311


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>