v4.2.0-preview4
[SPARK-56341][PYTHON][DOCS] Fix outdated PyArrow minimum version in arrow_pandas.rst
[SPARK-53331][PS] Re-enable SPARK_ANSI_SQL_MODE during doc generation
[SPARK-36739][DOCS][PYTHON] Add apache license headers to makefiles
[SPARK-50821][PYTHON] Upgrade Py4J from 0.10.9.8 to 0.10.9.9