Fix bug that comments content cannot be filtered by regular expressions in local blocking rules

arm64-v8a A cross-platform app made for e-hentai & exhentai by Flutter. Features: Mobile, tablet, desktop layout(3 kinds) Vertical, horizontal, double column read page layout(4 kinds) GalleryPage, Popular, Favorite, Watched, History, support multiple gallery list style search, search suggestion, tap tag to search, file search, jump to a certain page online reading and download, support restore download task, support synchronize updates after the uploader has uploaded a new version archive download and automatic unpacking and reading support loading local images and read support assign priority to download task manually support assign group to gallery and archive favorite, rating, torrent, archive, statistics, share password login, Cookie login, web login support EX site(domain fronting optional) vote for Tag, watch and hidden tags comment, vote for comment Fingerprint unlock Support shortcut keys like 'Tab' and 'Arrow keys' in desktop layout