minor #15615 [Serializer] Fixed context key (lyrixx)

This PR was merged into the 5.4 branch.

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[Serializer] Fixed context key

because of code update

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2d36105 [Serializer] Fixed context key

Author: javiereguiluz

serializer.rst

@@ -162,7 +162,7 @@ resources. This context is passed to all normalizers. For example:
 
 .. versionadded:: 5.4
 
-    The usage of the ``empty_arrays_as_object`` option by default in the
+    The usage of the ``empty_array_as_object`` option by default in the
     Serializer was introduced in Symfony 5.4.
 
 You can pass the context like following::