I don’t think it is … but it is kind of odd that we allow:
https://meta.discourse.org/u/codinghorror
https://meta.discourse.org/u/codinghorrOr
https://meta.discourse.org/u/cOdinghorror
We should normalize the username to lowercase username and force a redirect for the various obscure mis-cased usages similar to how we normalize topic urls / category urls.
I guess the same normalization should hold for https://meta.discourse.org/g/Admins
We already perform normalization using a redirect for https://meta.discourse.org/c/Bug/1/l/unread and https://meta.discourse.org/t/incorrect-canonical-url-for-user-profile-PAGE/190847
Low priority but we should clean this up.
Changing this to Contribute > Feature though cause nothing is really broken, it is just odd and inconsistent.