## Summary
- Fixes https://github.com/twentyhq/twenty/issues/20906
- Moves `markStepForRecomputation` from `useUpdateStep` into the
lower-level `useUpdateWorkflowVersionStep` hook, so **every** caller
that updates a step also triggers output schema recomputation.
- Previously, renaming a step via the side panel title input called
`useUpdateWorkflowVersionStep` directly (bypassing `useUpdateStep`), so
the variable picker kept showing the initial default name (e.g. "Create
Record") instead of the user's custom name.
## Test plan
- [x] Rename a workflow step via the side panel title input
- [x] Verify the variable picker dropdown shows the updated name
- [x] Verify variable tags/chips in subsequent steps reflect the updated
name
- [x] Verify that updating step settings (e.g. changing object type)
still refreshes the output schema correctly
