Fixed the last references to security.yml

Author: javiereguiluz

security/entity_provider.rst

@@ -24,7 +24,7 @@ Introduction
 Loading users via a Doctrine entity has 2 basic steps:
 
 #. :ref:`Create your User entity <security-crete-user-entity>`
-#. :ref:`Configure security.yml to load from your entity <security-config-entity-provider>`
+#. :ref:`Configure security.yaml to load from your entity <security-config-entity-provider>`
 
 Afterwards, you can learn more about :ref:`forbidding inactive users <security-advanced-user-interface>`,
 :ref:`using a custom query <authenticating-someone-with-a-custom-entity-provider>`

security/form_login_setup.rst

@@ -231,7 +231,7 @@ Finally, create the template:
 The form can look like anything, but it usually follows some conventions:
 
 * The ``<form>`` element sends a ``POST`` request to the ``login`` route, since
-  that's what you configured under the ``form_login`` key in ``security.yml``;
+  that's what you configured under the ``form_login`` key in ``security.yaml``;
 * The username field has the name ``_username`` and the password field has the
   name ``_password``.