Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -98,7 +98,7 @@ Feel free to explore, learn, and contribute by adding information, corrections,
   - [Quantum Decoherence](#quantum-decoherence)  
   - [Qutrits and Qudits](#qutrits-and-qudits)
 
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+- [How to Contribute](#how-to-contribute)
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