IND vs ENG Test: Rishabh Pant reprimanded by ICC - why has he been punished?

Rishabh Pant has been reprimanded by the ICC for breaching the Code of Conduct during the Headingley Test against England. Pant showed dissent at an umpire's decision regarding the condition of the ball, leading to a demerit point on his record. Despite this incident, Pant had an outstanding batting performance, scoring two centuries in the match.