chore: add working trackers

The previeus tracker are no longer working.

[ci skip]

Author: GerryFerdinandus

enduser/add_trackers.txt

@@ -1,4 +1,3 @@
-udp://tracker.openbittorrent.com:80/announce
-udp://tracker.publicbt.com:80/announce
-udp://tracker.istole.it:80/announce
-udp://open.demonii.com:1337/announce
+udp://tracker.coppersurfer.tk:6969/announce
+udp://tracker.leechers-paradise.org:6969/announce
+udp://tracker.opentrackr.org:1337/announce