Custom file input button border radius not correct

[QballDevelop]

If you look good at below screenshot of the custom file input from BS4 docs, you'll see a border radius bug in the second button from right.

Now it's not that striking but if you change the button background color, it will be.

I believe that the fix is very simpel:
In the _input-group.scss file on line 49 and 51 it's styling the "::before" selector. I think it should be the "::after" selector.

I've done a search for the custom-file-label class and found another line at which the developers should take a look at when fixing this issue, it's in the mixin/_forms.scss on line 122. I don't know if that's not correct as well because I didn't give it much attention but it does look like it's not correct.

[ysds]

Wii be fixed via #25356