use soft link

Author: Gordon119

docs/index.rst

@@ -9,7 +9,7 @@ LibMultiLabel is a library for binary, multi-class, and multi-label classificati
 
 LibMultiLabel can be used through either `Command Line Interface <cli_index.html>`_ or `APIs <library_index.html>`_. Check their respective documents for installation instructions.
 
-For practical use, please see the `Tutorial <https://www.csie.ntu.edu.tw/~cjlin/libmultilabel/tutorial.html>`_.
+For practical use, please see the `Tutorials <tutorial.html>`_.
 
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    :maxdepth: 1