fix ansible 2.x error

playbooks/roles/edxapp/tasks/deploy.yml

@@ -180,7 +180,7 @@
     - install:app-requirements
 
 # Install the python requirements into {{ edxapp_venv_dir }}
-- name: install python requirements
+- name: Install python requirements
   # Need to use command rather than pip so that we can maintain the context of our current working directory; some
   # requirements are pathed relative to the edx-platform repo. Using the pip from inside the virtual environment implicitly
   # installs everything into that virtual environment.