YMDK Wings: Update config.h (#12718)

Adds Caps Lock LED indicator configuration.

keyboards/ymdk/wings/config.h

@@ -49,6 +49,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BACKLIGHT_BREATHING
 #define BACKLIGHT_LEVELS 3
 
+#define LED_CAPS_LOCK_PIN C7
+#define LED_PIN_ON_STATE 0
+
 #define RGB_DI_PIN E2
 #ifdef RGB_DI_PIN
 #define RGBLED_NUM 14