Update README.md

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

Author: FabianaCampanari

README.md

@@ -415,6 +415,9 @@ In the context of Linear Programming (LP) and the Simplex Method, Excel Solver c
 
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+## Simplex Method using Excel Solver
+
+This example shows how to solve a Linear Programming (LP) problem using the **Simplex Method** via **Excel Solver**.