make directions for new release

[it-hms]

Add directions to the readme for contributing a release. This includes the following steps:

• do not name feature branch release/vX.Y.Z. This will will be done by automation.
• ensure that CHANGELOG.MD has been updated
• last commit subject should be RELEASE: vX.Y.Z
• When PR is approved, delete feature branch(s). create tag from main branch.

git tag vX.Y.Z
git push vX.Y.Z 

[alexjhawk]

@it-hms,

I have removed the documentation tag and added a new upstream tag. This change is more applicable to the upstream starter project, as that is what provides the underlying framework/structure for creating releases.

This issue has already been duplicated to the starter project repository, but I also wanted to update this location to indicate better where this effort pertains.