Dead links to anchors (#1701)
Dead links to anchors (#1701)

Fixing incorrect links to two anchors.
vega/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite