docs: Fix ref

docs/changelog.rst

@@ -7,7 +7,7 @@ Changelog
 Changed
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--  :func:`~ocdskingfishercolab.save_dataframe_to_sheet` and :func:`save_dataframe_to_spreadsheet` do nothing if the data frame is empty.
+-  :func:`~ocdskingfishercolab.save_dataframe_to_sheet` and :func:`~ocdskingfishercolab.save_dataframe_to_spreadsheet` do nothing if the data frame is empty.
 -  :func:`~ocdskingfishercolab.calculate_coverage`: Rename keyword arguments ``sql`` to ``print_sql`` and ``sql_only`` to ``return_sql``.
 -  :func:`~ocdskingfishercolab.calculate_coverage` simplifies the query if ``"ALL "`` is prefixed to a field that is not within an array.
 -  :func:`~ocdskingfishercolab.calculate_coverage` raises an error if no ``fields`` are provided.