Updated proper motions for Local Group dwarf galaxies using Gaia Early
  Data Release 3
  Updated systemic proper motion estimates for 58 Milky Way satellite galaxies,
based on Gaia Early Data Release 3 (EDR3), are provided. This sample is
identical to that studied by McConnachie & Venn (2020) and the methodology is
essentially unchanged from the original paper. The superiority of Gaia EDR3
compared to Gaia Data Release 2 means that Bo{\"o}tes 4, Cetus 3, Pegasus 3 and
Virgo 1 have detectable systemic proper motions for the first time. For the
entire galaxy sample, the median random uncertainties in the systemic proper
motions are approximately a factor of two better than the previous estimates
using Gaia DR2. Relevant systematic errors, which are also a factor of two
smaller, dominate over random uncertainties for 25 out of the 58 objects in the
sample.
