Fix bitcoin dead address

[pedromcunha]

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Project	Deployment	Actions	Updated (UTC)
relay-sdk-demo	Building	Preview, Comment	Jul 1, 2026 2:12am

[github-actions]

Claude finished @pedromcunha's task in 25s —— View job

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📝 Docs Drift Check — No docs impact

This PR does not touch surfaces that require a relayprotocol/relay-docs update.

[github-actions]

Claude finished @pedromcunha's task in 28s —— View job

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Code Review

Code Review -- No issues found.

Reviewed 2 files, 6 lines changed. Checked for correctness, security, error handling, and repo guidelines compliance.

The change swaps bitcoinDeadAddress from a bech32 SegWit address (bc1q4vxn43l44h30nkluqfxd9eckf45vr2awz38lwa) to the legacy P2PKH genesis-block address (1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa). The new value is a valid, well-known Bitcoin address, which addresses the preview error described in the changeset. Since getDeadAddress and isDeadAddress both reference the constant, they update consistently. Changeset (patch on @relayprotocol/relay-sdk) is appropriate.