Update README.md

README.md

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 # Kairos — Open Source AI Quantum/Classical Cryptography Assistant
 
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-  <img src="https://cdn-uploads.huggingface.co/production/uploads/67329d3f69fded92d56ab41a/KsodVATIm0ygq86rMB5dz.jpeg" width="100%" style="object-fit: cover; object-position: top; height: 180px;" alt="Kairos">
+  <img src="https://cdn-uploads.huggingface.co/production/uploads/67329d3f69fded92d56ab41a/KsodVATIm0ygq86rMB5dz.jpeg" width="100%" style="object-fit: cover; object-position: top; height: 250px;" alt="Kairos">
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