Update README.md

Signed-off-by: Fabiana 🚀  Campanari <[email protected]>

Author: FabianaCampanari

README.md

@@ -51,7 +51,7 @@ The [key difference]() between sim-opt and other analytical tools is its [abilit
 
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-## I- [Optimization Problem]()
+## I- Example of a [Optimization Problem]()
 
 ### An optimization problem can be represented using the `optidef` package. For example: