I always advocate for a scope that has an adjustable objective to correct the parallax and be able to focus clearly on targets, which for a 22 are generally 50m and closer...
So, IMHO as an entry level scope I see nothing wrong with a Bushnell Banner 4-12x40AO or a Bushnell Trophy 4-12x40AO. Both of these offerings are reasonably priced.
And let's be honest, while the Ruger 10/22 is a great little gun for casual plinking & small game hunting, they're not going to set accuracy records & as such, I wouldn't spend more on the scope than I did on the rifle...
Oh, and this is not be slagging on the Ruger 10/22, just being a realist about the platform & the capabilities of the base model most folks have.