update precompiled image link for v1.4 (#279)
update precompiled image link for v1.4 (#279)


JorisBolsens/PYNQ,yunqu/PYNQ,JorisBolsens/PYNQ,Xilinx/PYNQ,cathalmccabe/PYNQ,schelleg/PYNQ,yunqu/PYNQ,cathalmccabe/PYNQ,JorisBolsens/PYNQ,Xilinx/PYNQ,schelleg/PYNQ,schelleg/PYNQ,cathalmccabe/PYNQ,schelleg/PYNQ,cathalmccabe/PYNQ,yunqu/PYNQ,cathalmccabe/PYNQ,JorisBolsens/PYNQ,Xilinx/PYNQ,cathalmccabe/PYNQ,Xilinx/PYNQ,JorisBolsens/PYNQ,yunqu/PYNQ,yunqu/PYNQ,schelleg/PYNQ,Xilinx/PYNQ