Readme: changed link to config.sample file

to link directly to the plaintext version for convenient `wget` action

README.md

@@ -48,5 +48,5 @@ of that.
 [torrent]: http://wiki.theory.org/BitTorrentSpecification
 [erdgeist]: https://erdgeist.org/about/
 [opentracker]: https://erdgeist.org/arts/software/opentracker/
-[config]: https://erdgeist.org/gitweb/opentracker/tree/opentracker.conf.sample
+[config]: https://erdgeist.org/gitweb/opentracker/plain/opentracker.conf.sample
 [repo]: https://git.mike-ochmann.de/miko/opentracker