[No QA] Docs updates for E/A#93941 Workspace member role filter availability and reset

[MelvinBot]

Explanation of Change

PR #93941 fixes the Workspace Members role filter so that when the currently-selected role is no longer an available option (for example, after the workspace plan changes and removes that role from the dropdown), the filter falls back to All members instead of staying stuck on a now-unavailable role.

The existing help article Managing-Workspace-Members.md documents this filter but was out of date with the current UI. This docs update:

• Corrects the dropdown label from Admins to Workspace Admins (the actual UI label) and notes it is not available on Submit workspaces.
• Adds the Editors option, which is shown on Submit workspaces only.
• Documents that the available roles depend on the workspace type, and that the filter automatically resets to All members when the selected role is no longer available after a plan change (the behavior fixed in the PR above).

Role labels and availability were verified against the source of truth in src/languages/en.ts and src/pages/workspace/WorkspaceMembersPage.tsx.

Fixed Issues

$ #93933
PROPOSAL:

Tests

// TODO: The human co-author must fill out the tests you ran before marking this PR as "ready for review"

This is a HelpDot docs-only change. To validate, open Workspace settings > Members on a Submit workspace, confirm the filter shows Editors, then upgrade to Collect/Control and confirm the documented labels (Workspace Admins, Card Admins, Auditors) and the auto-reset to All members match the article.

• Verify that no errors appear in the JS console

Offline tests

N/A — documentation-only change.

QA Steps

// TODO: The human co-author must fill out the QA tests you ran before marking this PR as "ready for review".

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I verified the labels and behavior documented match the current UI (verified against en.ts and WorkspaceMembersPage.tsx)

Screenshots/Videos

N/A — documentation-only change.

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@MelvinBot, please review the files changed and confirm they reflect the current behavior. Then mark this PR Ready for review.

[OSBotify]

A preview of your ExpensifyHelp changes have been deployed to https://00b88dae.helpdot.pages.dev ⚡️

Updated articles:

• articles/new-expensify/workspaces/Managing-Workspace-Members