fix Google provider CHANGELOG.rst (#29122)

Author: raphaelauv

airflow/providers/google/CHANGELOG.rst

@@ -127,7 +127,7 @@ So for example you may store the keyfile json as ``keyfile_dict`` instead of
 ``extra__google_cloud_platform__keyfile_dict``.  If both are present, the short name will be preferred.
 
 * ``Add backward compatibility with old versions of Apache Beam (#27263)``
-* ``Add deferrable mode to GCPToBigQueryOperator + tests (#27052)``
+* ``Add deferrable mode to GCSToBigQueryOperator + tests (#27052)``
 * ``Add system tests for Vertex AI operators in new approach (#27053)``
 * ``Dataform operators, links, update system tests and docs (#27144)``
 * ``Allow values in WorkflowsCreateExecutionOperator execution argument to be dicts (#27361)``