Docs updates for E/A#92202 Document Sage Intacct travel invoicing reconciliation

[MelvinBot]

Summary

Adds help-site documentation for the Sync travel invoicing settlements advanced setting added to the Sage Intacct connection in #92202.

• Documents the new Sync travel invoicing settlements toggle in the Sage Intacct Advanced settings section, including its dependency on Auto-sync.
• Documents the Reconciliation account picker shown when the toggle is enabled.
• Cross-links to the existing Travel Invoicing enablement article as the prerequisite workflow.

Changed files

• docs/articles/new-expensify/connections/sage-intacct/Configure-Sage-Intacct.md

Authoring compliance

• UI labels (Sync travel invoicing settlements, Reconciliation account, Auto-sync) match the App source strings exactly and use Sentence case per HELPSITE_NAMING_CONVENTIONS.md.
• New ## subsection matches the existing sibling structure under the Advanced settings section.
• Toggle/menu labels are bolded; cross-link uses a descriptive relative link per HELP_AUTHORING_GUIDELINES.md.

Note: This feature is gated behind Travel Invoicing being enabled and Expensify Cards being provisioned, so it could not be exercised in a live UI session. The labels were verified against the App source strings (src/languages/en.ts), which are what the live UI renders.

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

[MelvinBot]

The failing build check is not caused by this PR. It's an environmental failure on the shared Deploy ExpensifyHelp workflow: the Install pcregrep step (sudo apt-get install -y pcregrep) is failing with E: Unable to locate package pcregrep on the Blacksmith ubuntu-2404 runner.

This PR only changes one Markdown file (docs/.../Configure-Sage-Intacct.md) and doesn't touch the workflow — so I have not pushed a change to this branch (bundling a shared CI fix into a docs PR would be out of scope, and it wouldn't fix the other affected PRs).

Evidence it's environmental, not this PR

• The identical Install pcregrep step succeeded on main at 15:05 UTC today (run 27022788332) and then started failing on every docs PR at ~18:19–18:21 UTC. Same command, same runner OS, no change to the step.
• The workflow file on this branch is byte-identical to origin/main (deployExpensifyHelp.yml:40-41, runner :33).
• The same failure is hitting 5+ docs PRs simultaneously (e.g. docs-xero-travel-invoicing-cr, melvin-docs-auditor-readonly-workspace, claude-docs-qbo-travel-invoicing-cr), which is the signature of a shared-runner/infra issue rather than a per-PR bug.

pcregrep is used by enforceVideoFormats.sh:44. Because the package installed fine hours earlier on the same OS, it hasn't been removed from the archive — the runner's apt package index is just stale/empty, so apt-get install can't locate it.

Recommended fix (separate infra PR on main, not this PR): add sudo apt-get update before the install:

- name: Install pcregrep
  run: sudo apt-get update && sudo apt-get install -y pcregrep

The workflow currently never runs apt-get update, so it only works while the runner image happens to have a warm package index.

What you can do now:

• Re-running the check may pass if it lands on a runner with a warm index, but it isn't a reliable fix.
• @MelvinBot open an infra PR to fix this and I'll raise a dedicated PR to add apt-get update to deployExpensifyHelp.yml. Once that merges to main and you merge main into this branch, the check will pass.