Fix broken holoviews link (#1427)
Fix broken holoviews link (#1427)


jcmgray/xarray,rabernat/xray,markelg/xray,xray/xray,pydata/xarray,markelg/xray,pydata/xarray,jhamman/xray,pydata/xarray,shoyer/xray,rabernat/xray,jhamman/xarray,shoyer/xarray,chunweiyuan/xarray,shoyer/xarray,markelg/xray,jhamman/xarray,jhamman/xarray