Fix typo (#1101)

* Fix typo

* Update index.md

Author: piperchester

locale/en/about/index.md

@@ -41,7 +41,7 @@ If some of this language is unfamiliar, there is a full article on
 
 Node is similar in design to, and influenced by, systems like Ruby's
 [Event Machine][] or Python's [Twisted][]. Node takes the event model a bit
-further, it presents an [event loop][] as a runtime construct instead of as a library. In other systems there is always a blocking call to start the
+further. It presents an [event loop][] as a runtime construct instead of as a library. In other systems there is always a blocking call to start the
 event-loop.
 Typically behavior is defined through callbacks at the beginning of a script
 and at the end starts a server through a blocking call like