ThermionicScott is right. They're called "ramps", and they're molded (or milled?) into the chainring to make shifting easier and smoother. You can google "chainring ramps" for info and pictures, to put your mind completely at rest regarding this.
(edit: I was wrong, I've gotten my terminology wrong. The "ramps" are on the inner surface of the chainring. I'm not sure what they call the shaping of the chainring teeth, but TS is right, the shaping is intentional, to aid in shifting. The chainring in your picture looks to be in great shape, many, many miles of wear left.)
Last edited by noimagination; 07-06-22 at 06:52 AM.