Did Sony announce a PS5 Pro? I think its just a rumor at this time. And even if so, we don't know what the system can do, what restrictions or problems it could have and what it will cost. We don't know if the console will be available without a problem. We don't know when the thing comes out either, if ever. It's incredible hard to know if its worth waiting, if we don't know anything.
And second, if you really need a console right now, then buy one. My thumb of rule is, if you can wait, then wait. So this is ultimately your decision.