Nano: fix torch version to enable nano API doc (#6429)
Nano: fix torch version to enable nano API doc (#6429)


yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL