You're fine. It looks like it was just through the tread. You can superglue or not; probably doesn't matter for a hole that size anyway. If you ride much, you'll pick up a lot of small cuts like that. If you replaced the tire each time it happened, you'd be out a small fortune pretty quickly.
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Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --
the tiniest sprinter