Update instrument_raspPi.json

datasheets/instrument_raspPi.json

@@ -9,8 +9,8 @@
 		"type": "single_board_computer",
 		"manufacturer": "Raspberry Pi Foundation",
 		"model": "Raspberry Pi 4 Model B Rev. 1.5",
-		"serial": "10000000483672da",
+		"serial": "xxxxxxxxxxxx",
 		"operating_system": "Raspberry Pi OS",
 		"comment": "to get model and serial number put this code in the terminal: cat /proc/cpuinfo"
 	}
-}
\ No newline at end of file
+}