minor #12394 Fixed typo (ThomasLandauer)

This PR was merged into the 4.3 branch.

Discussion
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Fixed typo

Commits
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aa0e5cc Fixed typo

Author: javiereguiluz

doctrine/events.rst

@@ -26,8 +26,8 @@ There are different ways to listen to these Doctrine events:
 These are the **drawbacks and advantages** of each one:
 
 * Callbacks have better performance because they only apply to a single entity
-  class, but you can't reuse the logic for different entities and they can't
-  access to :doc:`Symfony services </service_container>`;
+  class, but you can't reuse the logic for different entities and they don't
+  have access to :doc:`Symfony services </service_container>`;
 * Lifecycle listeners and subscribers can reuse logic among different entities
   and can access Symfony services but their performance is worse because they
   are called for all entities;