anup: Update usage text for add and set commands
anup: Update usage text for add and set commands

This updates the usage text for the optional "matcher" argument to only mention the "{episode}" value. The "{title}" one hasn't been used since fd3d5aaa6f80c2987701bc0dcb4a951e6a292a19 and will most likely end up being removed entirely from anup.

Acizza/anitrack