Revert "Update volume specification for vSphere in volumes.md"
Revert "Update volume specification for vSphere in volumes.md"

This reverts commit 047221dd6f883230f39cdc72764f448adc506c6a.

aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,erictune/erictune.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io,erictune/erictune.github.io,erictune/erictune.github.io,erictune/erictune.github.io,rata/kubernetes.github.io,erictune/erictune.github.io,rata/kubernetes.github.io