fix it FOR REALS

Author: steveklabnik

_posts/2018-10-19-Update-on-crates.io-incident.md

@@ -8,8 +8,8 @@ On Tuesday, Oct 15, starting at approximately 20:00 UTC, crates.io sustained
 an operational incident. You can find the status page report [here][status], and our
 tweets about it [here][tweets].
 
-status: http://status.crates.io/incidents/cymjwvkrtjn3
-tweets: https://twitter.com/cratesiostatus/status/1051953125030940674
+[status]: http://status.crates.io/incidents/cymjwvkrtjn3
+[tweets]: https://twitter.com/cratesiostatus/status/1051953125030940674
 
 ## Root Cause