Fix typo

src/pe/raytracing/Lighting.h

@@ -13,7 +13,7 @@
 //  You should have received a copy of the GNU General Public License along
 //  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
 //
-//! \file PointLight.h
+//! \file Lighting.h
 //! \author Lukas Werner
 //
 //======================================================================================================================