Update index.md (#9813)
Update index.md (#9813)

* Update index.md

corrected spellings of reconcile and changes "roll-back task to" to "roll-back to"

* grammar fixes

docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io