Update README.md

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

Author: FabianaCampanari

README.md

@@ -69,8 +69,12 @@ Feel free to explore, contribute, and share your insights!
 
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+6. **Paul Dirac (1928)**
+   * Developed the relativistic theory of the electron and contributed to quantum mechanics.
+     
+   * **Formula**: Dirac equation: $\huge \color{DeepSkyBlue} {\left( i \hbar \gamma^\mu \partial_\mu - mc \right) \psi = 0}$
 
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