minor #12855 Update security.rst (abdounikarim)

This PR was merged into the 4.4 branch.

Discussion
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Update security.rst

Hello, since version 4.4, we use `lazy`.

Commits
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eb4a0ad Update security.rst

Author: javiereguiluz

security.rst

@@ -239,7 +239,7 @@ important section is ``firewalls``:
                     pattern: ^/(_(profiler|wdt)|css|images|js)/
                     security: false
                 main:
-                    anonymous: ~
+                    anonymous: lazy
 
     .. code-block:: xml