[Mod]update readme with new VNConda info
[Mod]update readme with new VNConda info

msincenselee/vnpy,andrewchenshx/vnpy,bigdig/vnpy,vnpy/vnpy,bigdig/vnpy,bigdig/vnpy,andrewchenshx/vnpy,andrewchenshx/vnpy,bigdig/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,msincenselee/vnpy,andrewchenshx/vnpy,vnpy/vnpy,msincenselee/vnpy