docs.voltha.org release notes

Intent

Update release notes to capture details and version information for a given release.

Update Instructions

• This action should be performed after all build and component releases.

• Clone repo:voltha-docs

• Naviagate to the release_notes folder.

• Copy the last voltha_X.Y.rst document name name it for the upcoming release.

• Update index.rst so documents are displayed in order.