SparkSubmitOperator: rename spark_conn_id to conn_id (#31952)

airflow/providers/apache/spark/operators/spark_submit.py

@@ -38,7 +38,7 @@ class SparkSubmitOperator(BaseOperator):
 
     :param application: The application that submitted as a job, either jar or py file. (templated)
     :param conf: Arbitrary Spark configuration properties (templated)
-    :param spark_conn_id: The :ref:`spark connection id <howto/connection:spark>` as configured
+    :param conn_id: The :ref:`spark connection id <howto/connection:spark>` as configured
         in Airflow administration. When an invalid connection_id is supplied, it will default to yarn.
     :param files: Upload additional files to the executor running the job, separated by a
                   comma. Files will be placed in the working directory of each executor.