I guess, there is no such a thing as 结婚戒指升级.
婚结了. That was it. It was already all done (pass tense).
But you might want to buy your wife as many diamond rings as you could afford, I guess, on the occasions of the 5th/10th/15th/25th/30th/.../50th anniversaries.
Well, rings are something you don't get to change a lot. Wouldn't it be a waste to keep more than a necessary number of rings? I mean, she'd wear the wedding band anyway.
Of course, that's different if she wears multiple rings at the same time.