Fix qBittorrent vpn enabled not using yes/no

Dane Lipscomberequested to merge
dlip/HomelabOS:bugfix/qbittorrent-vpn-enable into dev

Fixes #573 (closed) The docs specify that vpn enabled should be yes/no

https://github.com/MarkusMcNugen/docker-qBittorrentvpn#environment-variables

Edited by Dane Lipscombe

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