fix prowlarr api for qbittorrent registration

[fonzdm]

• Please check if the PR fulfills these requirements

• The branch naming convention follows our guidelines
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

With this PR, qBitTorrent gets correctly registered inside Prowlarr on helm chart deploy.

• What is the current behavior? (You can also link to an open issue here)

At the moment, qBitTorrent is not registered in Prowlarr. The failure in the API did not make the helm install fail.
This does not affect Jellyfin or Jellyseerr (since they rely upon sonarr and radarr).

• What is the new behavior (if this is a feature change)?

Now Prowlarr can be used to directly download stuff found via the configured indexers.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Yes, in the sense that it resolves a bug that made a prwolarr feature not working.

• Other information:

While fixing this but, an API invocation has been removed (Path mapping between Prowlarr and qBitTorrent) since this configuration is not supported (it was merely migrated from Sonarr/Radarr but has never been tested).

closes #22

[imgios]

LGTM :)