Arsenal star Gabriel Jesus admits he ‘could do better’ but the forward is ready to do ‘everything’ to help his team after Mikel Arteta changed his role at Manchester City. The 27-year-old made his 20th appearance of the Premier League season at Etihad Stadium in Sunday’s goalless draw. But Arteta unleashed Jesus from their left flank for only the third time with the Spaniard benching Leandro Trossard and managing Gabriel Martinelli’s return. Trossard had started in Arsenal’s previous top-flight fixture at home to Brentford and against FC Porto in the second leg of their Champions League last 1…