[radarrmeta] Catch errors

[Roxedus]

Catch errors for:

• When non-supprted prefixes are used in mass-refreshes. https://github.com/Servarr/discord-bot-cogs/blob/master/radarrmeta/radarrmeta.py#L120-L122 https://discord.com/channels/264387956343570434/1028838429972246548/1268700951380885505