docs: update links in basics and rendering documentation

Author: kosiew

docs/source/user-guide/basics.rst

@@ -73,7 +73,7 @@ DataFrames are typically created by calling a method on :py:class:`~datafusion.c
 calling the transformation methods, such as :py:func:`~datafusion.dataframe.DataFrame.filter`, :py:func:`~datafusion.dataframe.DataFrame.select`, :py:func:`~datafusion.dataframe.DataFrame.aggregate`,
 and :py:func:`~datafusion.dataframe.DataFrame.limit` to build up a query definition.
 
-For more details on working with DataFrames, including visualization options and conversion to other formats, see :doc:`dataframe`.
+For more details on working with DataFrames, including visualization options and conversion to other formats, see :doc:`dataframe/index`.
 
 Expressions
 -----------

docs/source/user-guide/dataframe/rendering.rst

@@ -224,9 +224,9 @@ Best Practices
 Additional Resources
 --------------------
 
-* :doc:`../user-guide/dataframe` - Complete guide to using DataFrames
-* :doc:`../user-guide/io/index` - I/O Guide for reading data from various sources
-* :doc:`../user-guide/data-sources` - Comprehensive data sources guide
+* :doc:`../dataframe/index` - Complete guide to using DataFrames
+* :doc:`../io/index` - I/O Guide for reading data from various sources
+* :doc:`../data-sources` - Comprehensive data sources guide
 * :ref:`io_csv` - CSV file reading
 * :ref:`io_parquet` - Parquet file reading  
 * :ref:`io_json` - JSON file reading