Fix code example

In the code example is a colon instead of semicolon at the end of line

Author: malteschlueter

service_container/tags.rst

@@ -800,7 +800,7 @@ array element. For example, to retrieve the ``handler_two`` handler::
         {
             $handlers = iterator_to_array($handlers);
 
-            $handlerTwo = $handlers['handler_two']:
+            $handlerTwo = $handlers['handler_two'];
         }
     }