SEO: JSON-LD url field still uses /dev path

[haydercyber]

From the 2026-05-30 SEO audit (P2-8 follow-up to #7).

The Organization JSON-LD in overrides/main.html sets "url": "https://secrets-bridge.io/dev". Once #7 lands and the canonical strategy is one URL pattern, align the JSON-LD url field with the chosen canonical root.

Action depends on which pattern wins after #7:

• If / becomes canonical via the new mike default redirect → "url": "https://secrets-bridge.io/"
• If /dev/... stays canonical → keep current value but make sitemap entries match