Correct flawed connector symbol in schematic for SiP architecture.

hardware/conn-mchip.sch

@@ -533,11 +533,9 @@ F 3 "~" H 2100 4350 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Connector:USB_C_Receptacle_USB2.0 J?
-U 1 1 6005D73A
+L Connector:USB_C_Receptacle_USB2.0 J2
+U 1 1 5F8F58D7
 P 2300 3100
-AR Path="/5F53D5B5/6005D73A" Ref="J?"  Part="1" 
-AR Path="/60040981/6005D73A" Ref="J2"  Part="1" 
 F 0 "J2" H 2407 3967 50  0000 C CNN
 F 1 "USB_C_Receptacle_USB2.0" H 2407 3876 50  0000 C CNN
 F 2 "Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12" H 2450 3100 50  0001 C CNN