[DOCS] Show actual sequence of Events during order

PaymentEvent and StockEvent were documented
in wrong order.

Documentation/Developer/Events/Index.rst

@@ -110,29 +110,27 @@ events:
    payment process was successful and an invoice is to be sent instead
    of an order confirmation.
 
+.. confval:: \Extcode\Cart\Event\Order\StockEvent
+
+   The third event should again be used by product extensions if they
+   provide stock management.
+
+   The EventListener should perform stock management for products of this
+   extension. Either count down the stock counter in the database or tell
+   the product service via an interface which products were bought how often.
+
 .. confval:: \Extcode\Cart\Event\Order\PaymentEvent
 
-   This third event in the row can be implemented by payment provider
+   This fourth event in the row can be implemented by payment provider
    extensions to forward to the payment provider at this point.
 
    In case of forwarding, the processing of the following events should be
    prevented via the `StoppableEventInterface`, because
-   `\Extcode\Cart\Event\Order\StockEvent` and
-   `\Extcode\Cart\Event\Order\FinishEvent` are only necessary if the
+   `\Extcode\Cart\Event\Order\FinishEvent` is only necessary if the
    payment process is successful.
 
    If the payment process is successful, the payment provider extension
-   should trigger the events `\Extcode\Cart\Event\Order\StockEvent` and
-   `\Extcode\Cart\Event\Order\FinishEvent` itself.
-
-.. confval:: \Extcode\Cart\Event\Order\StockEvent
-
-   The fourth event should again be used by product extensions if they
-   provide stock management.
-
-   The EventListener should perform stock management for products of this
-   extension. Either count down the stock counter in the database or tell
-   the product service via an interface which products were bought how often.
+   should trigger the event `\Extcode\Cart\Event\Order\FinishEvent`.
 
 .. confval:: \Extcode\Cart\Event\Order\FinishEvent