[epompeii]

release_version.yml now runs from any branch, the same way as rebase_cloud.yml. It no longer fails when it is dispatched from a branch other than devel, and it always checks out and releases devel. The Actions UI dispatches from the default branch, so before this change a release started from the UI always failed at the Require devel step.

• The Require devel step is removed.
• actions/checkout takes ref: devel. With fetch-depth: 0 it runs git checkout --force -B devel refs/remotes/origin/devel, so scripts/tag.sh still sees a local devel that equals origin/devel.
• The release checklist has 1 command with no --ref.

GitHub runs the workflow file from the dispatched ref. Until the next production deploy moves the default branch, use --ref devel for a release:

gh workflow run release_version.yml --repo bencherdev/bencher --ref devel -f bump=patch