Update lscr.io/linuxserver/prowlarr Docker tag to v1.20.1

This PR contains the following updates:

Package	Update	Change
lscr.io/linuxserver/prowlarr (source)	minor	`1.19.0` -> `1.20.1`

linuxserver/docker-prowlarr (lscr.io/linuxserver/prowlarr)

### [`v1.20.1`](https://togithub.com/linuxserver/docker-prowlarr/compare/nightly-1.19.0.4559-ls218...nightly-1.20.1.4591-ls6)

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McMumf / Homelab