Gave users a direct link to download external OpenStreetMap data for LifeSim's road network input

[karenmai-usace]

Description

Added sentence "Primary OpenStreetMap data for North America is available here [with hyperlink]" to help alleviate users from searching for road network data download link.

Affected documents

LifeSim User's Guide

Related issue(s)

No issues. Editorial addition.

Pre-submission checklist

• I have previewed these changes locally or via the PR preview URL
• My branch name uses one of the expected prefixes: docs/new/, docs/major/, docs/minor/, or docs/fix/
• I have updated 00-version-history.mdx if this change warrants a version entry
  It does not.
• I have assigned a specific peer reviewer via the Reviewers sidebar (if known)

Technical edit (Lanes 1, 2, and 3)

• Technical edit comments addressed — ready for Director review

Notes for reviewers

No necessary really necessary except Adam. Added only one sentence.

[github-actions]

📋 Assigned reviewers for this PR

• Peer reviewer(s): not assigned
• Lead Civil reviewer(s): not assigned
• Technical editor(s): not assigned
• Director reviewer(s): not assigned

The first approval from any assigned reviewer at the current stage advances the PR. Approvals from non-assigned reviewers are logged but do not advance the stage.

[github-actions]

📋 Lane: Editorial Fix

No formal review required.

@usace-rmc/docs-admin please review, merge, and approve the deploy.

[github-actions]

📄 Preview deployed for commit ac4fa08

https://usace-rmc.github.io/RMC-Software-Documentation-Previews/pr-124/

This preview updates automatically when new commits are pushed. Deleted when the PR closes.