MAINT Update spy.csv.
MAINT Update spy.csv.

ChinaQuants/pyfolio,raybuhr/pyfolio,yanheven/pyfolio,chayapan/pyfolio,r0k3/pyfolio,YihaoLu/pyfolio,ChinaQuants/pyfolio,quantopian/pyfolio,raybuhr/pyfolio,dursk/pyfolio,yanheven/pyfolio,sketchytechky/pyfolio,dursk/pyfolio,YihaoLu/pyfolio,quantopian/pyfolio,sketchytechky/pyfolio,femtotrader/pyfolio,r0k3/pyfolio,femtotrader/pyfolio