Completes MIL-005 task 5: the README section for Step 4 (the live Amazon page, which answers with a robot check) and the Run section about `PRODUCT_URL`. The README edit was left out of PR 36 by mistake (a failed script run), so the issue was closed before its README work landed; this PR adds it.
No code changed; no review record needed beyond RC-014.
Task: MIL-005#5
Tirsvad