Update tg4x RGB LED count (#20955)

keyboards/tg4x/config.h

@@ -37,7 +37,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGB_DI_PIN D2
 #ifdef RGB_DI_PIN
-  #define RGBLED_NUM 6
+  #define RGBLED_NUM 7
   #define RGBLIGHT_HUE_STEP 8
   #define RGBLIGHT_SAT_STEP 8
   #define RGBLIGHT_VAL_STEP 8