qbittorrent: add comment with updated version

need to wait until private trackers support it:
* AnimeBytes: https://animebytes.tv/rules/clients
* Orpheus: https://orpheus.network/rules.php?p=clients

docker-compose.yml

@@ -702,6 +702,7 @@ services:
 
   qbittorrent:
     image: lscr.io/linuxserver/qbittorrent:5.1.4-r1-ls437
+    #image: lscr.io/linuxserver/qbittorrent:5.2.0_v2.0.12-ls454
     container_name: qbittorrent
     environment:
       - PUID=${PUID}