Fix a bad MKS SGen-L pin (#14735)

Marlin/src/pins/lpc1768/pins_MKS_SGEN_L.h

@@ -192,7 +192,7 @@
   #define BTN_ENC          P1_30
 
   #if ENABLED(CR10_STOCKDISPLAY)
-    #define LCD_PINS_RS    P1_0
+    #define LCD_PINS_RS    P1_00
 
     #define BTN_EN1        P0_18
     #define BTN_EN2        P0_15