update doc

python/doc/installation.rst

@@ -48,8 +48,7 @@ Terminal::
 
 Dataset installation
 --------------------
-Download the data from `this link <https://gitlab.lis-lab
-.fr/skmad-suite/tff2020/-/tree/master/data>`_.
+Download the data from `this link <https://gitlab.lis-lab.fr/skmad-suite/tff2020/-/archive/master/tff2020-master.zip?path=data>`_.
 
 Then run function :py:func:`tffpy.utils.generate_config` in order to create
 a configuration file and modify it to specify the path to your data folder.
@@ -70,7 +69,7 @@ standard version of ``tffpy`` using ``pip``::
 Clone the Git repository::
 
     git clone git@gitlab.lis-lab.fr:skmad-suite/tff2020.git
-    cd tffpy
+    cd python
 
 You may also need to install required packages::