Erratum: Excited-state hydroxyl maser catalogue from the methanol multibeam survey – I. Positions and variability. Issue 4 (6th June 2020) - Avison, A; Quinn, L J; Fuller, G A; Caswell, J L; Green, J A; Breen, S L; Ellingsen, S P; Gray, M D; Pestalozzi, M; Thompson, M A; Voronkov, M A