A small fix to Lionheart Braum's passive

I think Lionheart Braum's passive deserves a small change. Making the symbol a lion would in my opinion not be the right thing, as it would make it more difficult to include a lion for a higher tier skin that can utilize it better as part of the concept. A small tweak to the two symbols in the middle to make them form a heart would crave little effort and be more in line with the theme. http://img.photobucket.com/albums/v709/stigtrix/Concepts/LoL/Lionheart%20Braum%201.1_zpsgvx4qkej.png