Update README.md

blockchain_integration/pi_network/PiShield/README.md

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 ![Static Badge](https://img.shields.io/badge/%F0%9F%9B%A1-PiShield-gold)
+![Static Badge](https://img.shields.io/badge/%F0%9F%A4%96-PiNexus-green)
 
 <p xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/"><a property="dct:title" rel="cc:attributionURL" href="https://github.com/KOSASIH/pi-nexus-autonomous-banking-network/tree/main/blockchain_integration/pi_network/PiShield">PiShield</a> by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="https://www.linkedin.com/in/kosasih-81b46b5a">KOSASIH</a> is licensed under <a href="https://creativecommons.org/licenses/by/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">Creative Commons Attribution 4.0 International<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" alt=""></a></p>