fix a link

Author: checkcheckzz

README.md

@@ -44,7 +44,7 @@ Here are some articles about system design related topics.
 * [Scalability for Dummies](http://www.lecloud.net/tagged/scalability)
 * [Scalable Web Architecture and Distributed Systems](http://www.aosabook.org/en/distsys.html)
 * [Numbers Everyone Should Know](http://everythingisdata.wordpress.com/2009/10/17/numbers-everyone-should-know/)
-* [Fallacies of distributed systems] (https://pages.cs.wisc.edu/~zuyu/files/fallacies.pdf)
+* [Fallacies of distributed systems](https://pages.cs.wisc.edu/~zuyu/files/fallacies.pdf)
 * [Scalable System Design Patterns](http://horicky.blogspot.com/2010/10/scalable-system-design-patterns.html)
 * [Introduction to Architecting Systems for Scale](http://lethain.com/introduction-to-architecting-systems-for-scale/)
 * [Transactions Across Datacenters](http://snarfed.org/transactions_across_datacenters_io.html)