That's fixable, no problem, we're told the limit is right there, anything in the outer tread block is "risky" of course, I've plugged many which were very close to the sidewall and a few times even in the sidewall, not supposed to do the sidewall at all but I've seen them last for years like that.
Plug or patch, either one works fine, I have seen plugs leak before on rare occasions, never seen a patch leak.