minor corr pip-install

perhaps there may be pip distribution using "pip-install" but "pip install" is universal afaik

docsite/latest/rst/gettingstarted.rst

@@ -89,7 +89,7 @@ You will want to install the dependencies needed by Ansible with pip if going fr
 
     # on Ubuntu, for example:
     apt-get install python-dev python-pip
-    pip-install PyYAML Jinja2 paramiko
+    pip install PyYAML Jinja2 paramiko
 
 Once running the env-setup script you'll be running from checkout and the default inventory file
 will be /etc/anisble/hosts.  You can optionally specify an inventory file (see :doc:`patterns`)