Update index.rst

Just a misclic onj a word

source/install/index.rst

@@ -90,7 +90,7 @@ Following this instructions, we'll create a ``inc/downstream.php`` file into GLP
 
    GLPI packages will certainly provide a ``inc/downstream.php`` file. This one must not be edited!
 
-   GLPI looks for a `local_define.php` file in its own `config` directory. If you want to use one form new config directory, you have to load it.
+   GLPI looks for a `local_define.php` file in its own `config` directory. If you want to use one from new config directory, you have to load it.
 
 Then, create a file in ``/etc/glpi/local_define.php`` with the following contents: