By Scott Trotter Roy Keane has upgraded his assessment of Erling Haaland’s all-round play from ‘League Two’ to the Championship after the Norwegian star’s cameo versus Nottingham Forest. The Manchester City superstar returned from injury at the City Ground but only started from the bench. Pep Guardiola turned to his charge with 62 minutes on the clock, and within 10 minutes he had doubled their lead. Haaland raced into the box from Kevin De Bruyne’s pass and sat down Murillo before slotting the ball past Matz Sels. However, the 23-year-old’s introduction signalled an uplift in City’s performan…