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Update serializers.rst #45202

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Expand Up @@ -20,7 +20,7 @@ Serialization

To support data exchange, like arguments, between tasks, Airflow needs to serialize the data to be exchanged and
deserialize it again when required in a downstream task. Serialization also happens so that the webserver and
the scheduler (as opposed to the DAG processor) do no need to read the DAG file. This is done for security purposes
the scheduler (as opposed to the DAG processor) do not need to read the DAG file. This is done for security purposes
and efficiency.

Serialization is a surprisingly hard job. Python out of the box only has support for serialization of primitives,
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