Link fix

Author: korken89

README.md

@@ -22,7 +22,7 @@ access the internal bootloader, and then when the firmware takes over it can swi
 * Target 5V and 3.3V is protected with an ideal diode circuit to not have current flow from the target to the host.
 * For compatibility (mainly with Tag-Connect TC2050), pin 7 on the STDC 14 can be connected to the protected 5V.
 
-The schematic can be found in [the schematic PDF](schematic-v1.4.pdf).
+The schematic can be found in [the schematic PDF](schematic-v1.3.pdf).
 
 ![alt text](hs-probe-top.jpg "probe")
 ![alt text](hs-probe-bot.jpg "probe")