Fix Markdown

Author: ddeboer

CHANGELOG.md

@@ -10,7 +10,7 @@ Changelog
   (https://github.com/FriendsOfSymfony/FOSHttpCache/blob/master/CHANGELOG.md) 
   for more information. Most importantly, we removed the hard coupling on the
   Guzzle HTTP client (using HTTPlug). Your composer.json now needs to
-  specify which HTTP client to install; see the [installation instructions].
+  specify which HTTP client to install; see the [installation instructions]
   (http://foshttpcachebundle.readthedocs.org/en/stable/installation.html)
 * Deprecated methods have been removed.