Update URLs for the Debian security tracker repo and mailing list.

wiki/src/contribute/release_process/Debian_security_updates.mdwn

@@ -19,11 +19,11 @@ read-only access to these queues.
 Security tracker
 ----------------
 
-The Debian [security tracker][web]'s [SVN repository][svn] is the main
+The Debian [security tracker][web]'s [GIT repository][git] is the main
 place where we can look at the Debian security team upcoming uploads
 and announces. There is also a [mailing list][] that broadcasts
 changes to this repository.
 
 [web]: http://security-tracker.debian.org/tracker/
-[svn]: http://svn.debian.org/wsvn/secure-testing
-[mailing list]: http://lists.alioth.debian.org/mailman/listinfo/secure-testing-commits
+[git]: https://salsa.debian.org/security-tracker-team/security-tracker
+[mailing list]: https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/debian-security-tracker-commits