minor #11643 Update custom-redirect-after-cart-add-action.rst (danakil)

This PR was merged into the 1.7 branch.

Discussion
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Fixed a typo in sprintf format ("$s" instead of "%s") in the "custom-redirect-after-cart-add-action" cookbook.

| Q               | A
| --------------- | -----
| Branch?         | master
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| License         | MIT



Commits
-------

102360d Update custom-redirect-after-cart-add-action.rst

docs/cookbook/shop/custom-redirect-after-cart-add-action.rst

@@ -90,7 +90,7 @@ Let's assume that you would like such a feature in your system:
         {
             if (!$event->getSubject() instanceof OrderItemInterface) {
                 throw new \LogicException(
-                    sprintf('This listener operates only on order item, got "$s"', get_class($event->getSubject()))
+                    sprintf('This listener operates only on order item, got "%s"', get_class($event->getSubject()))
                 );
             }