Add information on how to upgrade

Also fix some reST

NEWS.rst

@@ -5,7 +5,7 @@
 16.2.0
 ------
 
-Change back option in `do_tests` to keep the same comportment as in version <16.0.0. Override of module_list from configuration file is a new option.
+Change back option in ``do_tests`` to keep the same comportment as in version <16.0.0. Override of module_list from configuration file is a new option.
 
 16.1.0
 ------

README.rst

@@ -12,6 +12,8 @@
 Some scripts are in other sections, because they need some specialized library, in that case you need to indicate the name of section as in ``python3 -m pip install "hg+https://orus.io/xcg/odoo_scripts#egg=odoo_scripts[docker]"``.
 The prerequisites for this module or one of its section can be installed by using pip3 or the package manager; the requirements are defined in ``setup.py``.
 
+To upgrade Odoo scripts, just add ``--upgrade`` to the end of the command.
+
 It can also be cloned it before running ``python3 -m pip install .`` in the clone directory.
 
 .. important:: As there is no way of indicating sections (worse, it is handling them incorrectly), do not use ``python3 setup.py install``.