chore(cross-app-connect): refresh app-hub cache

[github-actions]

Scheduled refresh of cross-app-connect/src/app/cross-app/_lib/app-hub.json from vechain/app-hub.

The cache keys the registry by origin so the transact popup can show
Confirm token swap on Nubila instead of a raw URL. This PR appears
whenever a new app is added, an existing one is updated, or one is
removed from the registry.

Review the diff to make sure the changes look like additions you
expected (no surprise deletions, plausible names). Merge when happy.

🤖 Opened by .github/workflows/cross-app-connect-refresh-app-hub.yaml.

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