Erratum: Atmospheric characterization of the ultra-hot Jupiter MASCARA-2b/KELT-20b: Detection of Ca II, Fe II, Na I, and the Balmer series of H (H ?, H ?, and H ?) with high-dispersion transit spectroscopy (Astronomy and Astrophysics (2019) 628 (A9) DOI: 10.1051/0004-6361/201935623)