fix board size

Marlin/Configuration.h

@@ -1865,8 +1865,8 @@ non-belt-synced drives. In this case, a additional configuration has to be done
       #define Y_MAX_POS Y_BED_SIZE_CUSTOM
       #define Z_MAX_POS Z_BED_SIZE_CUSTOM
     #else
-      #define X_BED_SIZE 220
-      #define Y_BED_SIZE 220
+      #define X_BED_SIZE 235
+      #define Y_BED_SIZE 235
 
       // Travel limits (mm) after homing, corresponding to endstop positions.
       #define X_MIN_POS 0