Eh, that's very old, and it was somewhat of a polarizing opinion after the doc came out. Plenty of Indans thought Apu was fine as he was.
An apology was due to the rest of the Indians & South Asians who didn’t think the caricature ‘Apu’ was “fine”, and one was issued; plus even better, the show runners have learned that you can actually make comedy without minimising or othering cultural / ethnic groups. Great outcome.