Option 1: Leave it alone. It looks fine and gives you a little character. I'd do that. Let yourself have a tiny imperfection and embrace it.

Option 2: Treat it. I'd think a professional might recommend a bit of filler. I tend to like the idea of anagalous fat transfer, where they take your own fat and move it to that location. They might recommend subcision (with suction) first as well. But! There's always a chance of weird things happening when you get procedures done and I'd hate to see you make it worse or end up with issues when it's just this one little scar, so that's why I'm team Option 1.