DOC: update links for pyperf project rename
DOC: update links for pyperf project rename

spacetelescope/asv,spacetelescope/asv,qwhelan/asv,airspeed-velocity/asv,spacetelescope/asv,spacetelescope/asv,airspeed-velocity/asv,qwhelan/asv,airspeed-velocity/asv,qwhelan/asv,airspeed-velocity/asv,qwhelan/asv