[#3198] Minor tweaks

Author: weaverryan

reference/requirements.rst

@@ -27,7 +27,7 @@ Required
 .. caution::
 
     Be aware that Symfony2 has some known limitations when using PHP 5.3.8
-    or below. For more information see the `Requirements section of the readme`_
+    or below. For more information see the `Requirements section of the README`_.
 
 Optional
 --------
@@ -54,4 +54,4 @@ If you want to use Doctrine, you will need to have PDO installed. Additionally,
 you need to have the PDO driver installed for the database server you want
 to use.
 
-.. _`Requirements section of the readme`: https://github.com/symfony/symfony#requirements
+.. _`Requirements section of the README`: https://github.com/symfony/symfony#requirements