Update README.md

Fix typo

Author: pablofullana

README.md

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 <div align="center"><strong>Intents For Everyone, With Everyone</strong></div>
-<div align="center">a modular, open-source framework for permissionless, scalable intent execution.</div>
+<div align="center">A modular, open-source framework for permissionless, scalable intent execution.</div>
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 # Open Intents Framework