Windshield repair is best option but there are some usual products that you can use to repair this small crack. You can either use Auto Glass Repairing Glue or can prefer Windshield Repair Kit. Review the products:

Just repair it. It will be way more expensive to replace the entire windshield where repairing it is not nearly as much

You can get windshield glue which will remain the strength of the windshield if it is not all the way through. You do not want to buy a oem windshield because it will cost you $800 for the windshield alone vs an aftermarket for say $160-$200.

You need it repairing before it spreads, once it spreads it will need a new screen asap as they are structural to the vehicle.

I was driving and a rock hit my windshield and Made a crack. It's about the size of a dime and it's only on the outside of the windshield. Would I need to replace the whole thing or just get a repair? The hole is very small, but the crack is about dime size, like I mentioned earlier. Also, does toyota care cover windshield repairs?