fix: correct typo in DataFrame docstring from 'iteratables' to 'iterables'

Author: kosiew

python/datafusion/dataframe.py

@@ -489,7 +489,7 @@ def with_columns(
     ) -> DataFrame:
         """Add columns to the DataFrame.
 
-        By passing expressions, iteratables of expressions, or named expressions.
+        By passing expressions, iterables of expressions, or named expressions.
         All expressions must be :class:`~datafusion.expr.Expr` objects created via
         :func:`datafusion.col` or :func:`datafusion.lit`; plain strings are not
         accepted. To pass named expressions use the form ``name=Expr``.