plugins.foxtr: update regex to match new site layout
plugins.foxtr: update regex to match new site layout

chhe/streamlink,bastimeyer/streamlink,beardypig/streamlink,melmorabity/streamlink,javiercantero/streamlink,beardypig/streamlink,streamlink/streamlink,chhe/streamlink,back-to/streamlink,streamlink/streamlink,bastimeyer/streamlink,javiercantero/streamlink,gravyboat/streamlink,melmorabity/streamlink,wlerin/streamlink,wlerin/streamlink,gravyboat/streamlink,back-to/streamlink