Change url for pic

README.md

@@ -1,6 +1,6 @@
 # usb-serial
 Isolated USB to serial adapter
 
-![USB serial adapter](usb-serial.png)
+![USB serial adapter](pic/usbserial.png)
 
 Uses KiCad 7.0 and [kicad-jlcpcb-tools](https://github.com/Bouni/kicad-jlcpcb-tools) plugin for creating fabrication files.