Update windows_faq.rst (#67482)

Steers users around the error:  Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/usr/local/lib/python2.7/dist-packages/xmltodict.py'
Consider using the `--user` option or check the permissions. -->

docs/docsite/rst/user_guide/windows_faq.rst

@@ -56,7 +56,7 @@ can be run in the bash terminal:
 
     sudo apt-get update
     sudo apt-get install python-pip git libffi-dev libssl-dev -y
-    pip install ansible pywinrm
+    pip install --user ansible pywinrm
 
 To run Ansible from source instead of a release on the WSL, simply uninstall the pip
 installed version and then clone the git repo.