We recommend release processes using git-flow in Hippo Forge projects because it is easier for most people to understand and follow and also widely accepted.
The recommended instructions are based on git-flow. Please follow available references of git-flow like the following:
Basically, there are two different instructions. One is for the standard release process based on the latest development working branch, and the other is for the maintenance release process based on older version support branches.
Please see Standard Release Process Using git-flow.
Please see Maintenance Release Process Using git-flow.