docs: add live example agent #1029 on Sepolia

Author: cagataycali

README.md

@@ -10,6 +10,8 @@ agent("Register my agent on Ethereum and upload its profile to IPFS")
 [![PyPI](https://img.shields.io/pypi/v/strands-erc8004)](https://pypi.org/project/strands-erc8004/)
 [![8004.org](https://img.shields.io/badge/8004.org-green)](https://www.8004.org)
 
+> **Live example:** [Agent #1029 on Sepolia](https://8004agents.ai/sepolia/agent/1029) — registered using this package.
+
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 [ERC-8004](https://eips.ethereum.org/EIPS/eip-8004) is a standard for **trustless autonomous agents** on Ethereum. Agents get an ERC-721 identity token, accumulate on-chain reputation, and can be validated by third parties — all without pre-existing trust.