boot: fix trailing whitespace

stratosphere/boot/source/boot_repair_boot_images.cpp

@@ -13,7 +13,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
- 
+
 #include "boot_functions.hpp"
 #include "updater/updater_api.hpp"