fixing path in comment

playbooks/edx-east/commoncluster.yml

-# ansible-playbook -i ec2.py commoncluster.yml --extra-vars "deployment=edge env=stage" -e@/home/edward/git/edx-ops/edge-secure/ansible/vars/stage-edge.yml -T 30 --list-hosts
+# ansible-playbook -i ec2.py commoncluster.yml --extra-vars "deployment=edge env=stage" -e@/path/to/vars/env-deployment.yml -T 30 --list-hosts
 
 - hosts: tag_play_commoncluster:&tag_environment_{{ env }}:&tag_deployment_{{ deployment }}
   sudo: True