change the regex

[Reaper Lu]

Hi trickest,

Some may use the uppercase of Proof and Concept

(?i)[^a-z0-9]+([Pp]o[Cc]|[Pp]roof of [Cc]oncept|[Pp]roof[-_]of[-_][Cc]oncept)[^a-z0-9]+

such as the "Exploit Proof of Concept" in this page

Thanks,
dingisoul