Update tracker list in default config (#1416)

config/default_config.yml

@@ -110,7 +110,7 @@ torrents:
   trackers:
 # Trackers : Default trackers supported
     default:
-      - udp://tracker.doko.moe:6969
+      - udp://tracker.uw0.xyz:6969/announce
       - udp://tracker.coppersurfer.tk:6969
       - udp://tracker.zer0day.to:1337/announce
       - udp://tracker.leechers-paradise.org:6969