Minor rewording

Author: javiereguiluz

cookbook/install/unstable_versions.rst

@@ -4,7 +4,7 @@ How to Install and Use an Unstable Symfony Version
 Symfony releases two new minor versions (2.5, 2.6, 2.7, etc.) per year, one in
 May and one in November (:doc:`see releases detail <contributing/community/releases>`).
 Testing the new Symfony versions in your projects as soon as possible is important
-to ensure that they will keep working as expected.
+to ensure that they will keep working after upgrading to the new version.
 
 In this article you'll learn how to install and use new Symfony versions before
 they are released as stable versions.