From: https://github.com/PowerShell/PowerShell/blob/master/docs/maintainers/releasing.md

• Create a private branch named 6.1.0-preview.3 in private repository.
  All release related changes should happen in this branch.
• Run tests on all supported Linux distros and publish results
• Prepare packages
  • Build release packages
  • Sign the MSI packages and RPM package.
  • Install and verify the packages.
• Update documentation, scripts and Dockerfiles
  • Update CHANGELOG.md with the finalized change log draft.
  • Update other documents and scripts to use the new package names and links.
• Verify the release Dockerfiles.
• Create NuGet packages and publish them to powershell-core feed.
• Publish Linux packages to Microsoft YUM/APT repositories.
• Create the release tag and push the tag to PowerShell/PowerShell repository.
• Create the draft and publish the release in Github.
• Merge the release branch to master and delete the release branch.
• Trigger the release docker builds for Linux and Windows container images.
  • Linux: push a branch named docker to powershell/powershell repository to trigger the build at powershell docker hub.
    Delete the docker branch once the builds succeed.
  • Windows: queue a new build in PowerShell Windows Docker Build on VSTS.
• Verify the generated docker container images.