I said on my college application that I was doing a sport but then I ended up getting injured and was forced to quit, is this bad? Would the college think I’m lying about doing that sport in the first place?
No it’s very minor.
Unless you are a recruited athlete, should not make a difference.
The admissions officers do not fact check these type of things
It is not a big deal. If you want to, though, you could email the admissions officer with the update.