Help, please how to have straight last layer

Hello, Im using Cura for my Ender 3 Pro, and I really like my setting so far, but there is only 1 problem and I do not know how to have straight smooth end to the outer ring. Please can you help me. I don’t even know the name to call it, I hope you can help me, thank you.

Thanks for being here.

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I hope that helps!