Reduce peak LED brightness for AoS TKL (#9667)

keyboards/aos/tkl/config.h

@@ -53,4 +53,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     #define RGBLIGHT_HUE_STEP 8
     #define RGBLIGHT_SAT_STEP 8
     #define RGBLIGHT_VAL_STEP 8
+    #define RGBLIGHT_LIMIT_VAL 50
 #endif