Update README.md

Signed-off-by: David Osipov <[email protected]>

Author: DavidOsipov

README.md

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 [![Code Style: Black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Imports: isort](https://img.shields.io/badge/%20imports-isort-%231674b1?style=flat&labelColor=ef8336)](https://pycqa.github.io/isort/)
 
+[![SonarQube Cloud](https://sonarcloud.io/images/project_badges/sonarcloud-highlight.svg)](https://sonarcloud.io/summary/new_code?id=DavidOsipov_PostQuantum-Feldman-VSS)
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 This library provides a Python implementation of Feldman's Verifiable Secret Sharing (VSS) scheme, designed with **post-quantum security** in mind. It builds upon Shamir's Secret Sharing, adding mathematical verification to ensure the integrity of distributed shares, and uses hash-based commitments to resist quantum attacks.
 
 ## ATTENTION: