Fix two new explicit case fallthru warnings

Firmware/Marlin_main.cpp

@@ -744,7 +744,7 @@ static void factory_reset(char level)
 
 	case 2: // Level 2: Prepare for shipping
 		factory_reset_stats();
-		// [[fallthrough]] // there is no break intentionally
+		// FALLTHRU
 
 	case 3: // Level 3: Preparation after being serviced
 		// Force language selection at the next boot up.

Firmware/ultralcd.cpp

@@ -7146,8 +7146,8 @@ void lcd_sdcard_menu()
 			_md->fileCnt = card.getnrfilenames();
 			_md->sdSort = eeprom_read_byte((uint8_t*)EEPROM_SD_SORT);
 			_md->menuState = _standard;
-			// FALLTHRU
 		}
+		// FALLTHRU
 		case _standard: //normal menu structure.
 		{
 			if (!_md->lcd_scrollTimer.running()) //if the timer is not running, then the menu state was just switched, so redraw the screen.