DOC: Updates to documentation - io.rst (pandas-dev#61429)

Update io.rst

updating hdf5 data description link

Author: ConnorWallace15

doc/source/user_guide/io.rst

@@ -26,7 +26,7 @@ The pandas I/O API is a set of top level ``reader`` functions accessed like
     text, Local clipboard, :ref:`read_clipboard<io.clipboard>`, :ref:`to_clipboard<io.clipboard>`
     binary,`MS Excel <https://en.wikipedia.org/wiki/Microsoft_Excel>`__ , :ref:`read_excel<io.excel_reader>`, :ref:`to_excel<io.excel_writer>`
     binary,`OpenDocument <http://opendocumentformat.org>`__, :ref:`read_excel<io.ods>`, NA
-    binary,`HDF5 Format <https://support.hdfgroup.org/HDF5/whatishdf5.html>`__, :ref:`read_hdf<io.hdf5>`, :ref:`to_hdf<io.hdf5>`
+    binary,`HDF5 Format <https://support.hdfgroup.org/documentation/hdf5/latest/_intro_h_d_f5.html>`__, :ref:`read_hdf<io.hdf5>`, :ref:`to_hdf<io.hdf5>`
     binary,`Feather Format <https://github.com/wesm/feather>`__, :ref:`read_feather<io.feather>`, :ref:`to_feather<io.feather>`
     binary,`Parquet Format <https://parquet.apache.org/>`__, :ref:`read_parquet<io.parquet>`, :ref:`to_parquet<io.parquet>`
     binary,`ORC Format <https://orc.apache.org/>`__, :ref:`read_orc<io.orc>`, :ref:`to_orc<io.orc>`