Remove duplicate word in push.md
Remove duplicate word in push.md

Signed-off-by: Roch Feuillade <d276653fbd3df22d6d8cac864eaf639a40d4512a@pandobac.com>

cpuguy83/cli,docker/cli,thaJeztah/cli,docker/cli,thaJeztah/cli,cpuguy83/cli