Point New UI visual regression at the twenty-ui Argos project (#21728)

The `twenty-new-ui` Argos project is being renamed to `twenty-ui` (and
the old `twenty-ui` / `twenty-ui-vs-new-ui` projects removed).

Updates the New UI visual-regression flow to target `twenty-ui`: the
dispatch project mapping and the screenshot artifact name (which must
match `argos-screenshots-${project}`), plus the internal storybook
artifact name for consistency.

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.github/workflows/visual-regression-dispatch.yaml

@@ -39,7 +39,7 @@ jobs:
           script: |
             const name = context.payload.workflow_run.name;
             const projectByWorkflow = {
-              'CI New UI': 'twenty-new-ui',
+              'CI New UI': 'twenty-ui',
               'CI Front': 'twenty-front',
             };
             const project = projectByWorkflow[name] ?? 'twenty-front';