Docs updates for E/A#94694 Import workflows on Workflows page

[MelvinBot]

Explanation of Change

PR #94694 surfaces the spreadsheet importer on the Workflows page: under Approvals, admins can now click More → Import workflows to bulk-configure approval workflows via spreadsheet. Previously this importer was only reachable from Members → three-dot menu → Import via Spreadsheet, so the help site had no coverage of the Workflows-page entry point.

This PR documents the new flow by adding a How to import approval workflows from a spreadsheet section to the Add Approvals article. It:

• Documents the exact UI path: Workspaces > [Workspace Name] > Workflows → Approvals → More → Import workflows.
• Notes the Control-plan requirement / upgrade prompt for the advanced approval fields (Submit to, Forward to, Over limit forward to, Approval limit).
• Notes the v1 behavior that the import reuses the Members mapping screen and returns you to the Members page, and cross-links to the existing Invite Multiple Members via Spreadsheet section for column-mapping and template details.
• Adds relevant search keywords (import workflows, import approval workflows, bulk approval workflows, spreadsheet import).

Files changed

• docs/articles/new-expensify/workspaces/Add-Approvals.md

Related PR

• Surface "Import workflows" on the Workflows page #94694

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@jayeshmangwani, please review the files changed and confirm they reflect the current behavior. Then post a new comment saying @MelvinBot mark this PR as ready for review.