Merge "Update the murano_agent description"

doc/source/admin/murano_agent.rst

@@ -32,8 +32,8 @@ image with Murano specific metadata. More information about preparing images
 can be found :ref:`here <upload_images>`. This type of installation has some
 limitations. The image has to have pre-installed python. Murano-agent is
 installed from PyPi so the instance should have connectivity with the Internet.
-Also it requires an installation of some python packages, e.g. python-pip,
-python-dev, python-setuptools, python-virtualenv, which are also installed by
+Also it requires an installation of some python packages, e.g. python3-pip,
+python3-dev, python3-setuptools, python3-virtualenv, which are also installed by
 cloud-init.
 
 Interaction with murano-engine