Scraper "fernsehserien.de" does not load episode details for series with only one season

[raspitoaster]

Scrapers that don't work:

• [x] fernsehserien.de

Details which are wrong / not loaded: Episode details for series with only one season are not loaded correctly.

MediaElch Version:

• [ ] 2.12.1-dev (nightly)
• [x] 2.12.0 (stable)

Operating System:

• [x] Windows
• [ ] macOS
• [ ] Linux (distribution: ___)

Additional context: I think that this is caused by Fernsehserien.de because there are different URLs for series with only one season and for those with more than one:

e.g. the first episode of "Der Amsterdam Krimi" and of "Hakan Nesser" - both with only one season: https://www.fernsehserien.de/der-amsterdam-krimi/folgen/01-tod-in-der-prinzengracht-1242526 https://www.fernsehserien.de/hakan-nesser/folgen/01-das-vierte-opfer-86592

vs

e.g. the first episode of "Inspector Barnaby" and of "Maria Wern" - both with more than one season: https://www.fernsehserien.de/inspector-barnaby/folgen/1x01-blutige-anfaenger-70832 https://www.fernsehserien.de/maria-wern-kripo-gotland/folgen/1x01-das-geheimnis-der-toten-voegel-348025

Strange enough, if there is a pilot movie of a series, then they use the same pattern as for the first episode of a multi-season series: e.g. the pilot movie for "Inspector Barnaby": https://www.fernsehserien.de/inspector-barnaby/folgen/01-tod-in-badgers-drift-70831 instead of 0x01 or something like that.