Moving 'Publish - dry run' after 'Update version in files' broke publishing:
`flutter pub publish --dry-run` fails on warnings (exit 65) and treats the
dirty git tree left by the sed version edits as a warning ('checked-in files
are modified in git'). The dry-run must run on the clean checkout; the real
publish uses -f to force past the version-file edits. This restores the order
that worked for 2.1.0-2.3.0.