Updated the default values of some cookie config options

Author: javiereguiluz

reference/configuration/framework.rst

@@ -1240,7 +1240,7 @@ to the cookie specification.
 cookie_samesite
 ...............
 
-**type**: ``string`` or ``null`` **default**: ``null``
+**type**: ``string`` or ``null`` **default**: ``'lax'``
 
 It controls the way cookies are sent when the HTTP request was not originated
 from the same domain the cookies are associated to. Setting this option is
@@ -1271,10 +1271,10 @@ The possible values for this option are:
 cookie_secure
 .............
 
-**type**: ``boolean`` or ``string`` **default**: ``false``
+**type**: ``boolean`` or ``null`` **default**: ``null``
 
 This determines whether cookies should only be sent over secure connections. In
-addition to ``true`` and ``false``, there's a special ``'auto'`` value that
+addition to ``true`` and ``false``, there's a special ``null`` value that
 means ``true`` for HTTPS requests and ``false`` for HTTP requests.
 
 cookie_httponly