  This erratum aims to correct 1) the wrong expressions, 2) some typographical
errors, 3) some erroneous points made in discussion of the disparity of heat
flux ratios between our full RPA model and the local conductivity model, and 4)
the lower bound of the characteristic distance scale comparable to the graphene
thermal length, appearing in the original paper, which might confuse or mislead
readers. Collectively, they don't change the key physics we sought to present.
