Shortening code block for PHP

If you agree, I'll shorten YAML and XML too.

Author: ThomasLandauer

security.rst

@@ -1452,17 +1452,9 @@ You must enable this using the ``login_throttling`` setting:
             $mainFirewall = $security->firewall('main');
 
             // by default, the feature allows 5 login attempts per minute
-            $mainFirewall->loginThrottling();
-
-            // configure the maximum login attempts (per minute)
-            $mainFirewall->loginThrottling()
-                ->maxAttempts(3)
-            ;
-
-            // configure the maximum login attempts in a custom period of time
             $mainFirewall->loginThrottling()
-                ->maxAttempts(3)
-                ->interval('15 minutes')
+                // ->maxAttempts(3) // Optional: You can configure the maximum attempts ...
+                // ->interval('15 minutes') // ... and the period of time.
             ;
         };