fixed reference

Author: fabpot

guides/index.rst

@@ -11,7 +11,7 @@ Dive into Symfony2 with the topical guides:
     emails
     templating/index
     translation
-    validator
+    validation
     forms
     event/index
     tools/index

guides/map.rst.inc

@@ -18,7 +18,7 @@
   * :doc:`Advanced </guides/routing/advanced>`
 
 * :doc:`/guides/emails`
-* :doc:`/guides/validator`
+* :doc:`/guides/validation`
 * :doc:`/guides/forms`
 * :doc:`/guides/translation`
 * **Templating**: