Update README.md

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

Author: FabianaCampanari

README.md

@@ -989,7 +989,7 @@ Intersection of x_1 + 3x_2 = 7 and 2x_1 + 2x_2 = 8:
 
 <br><br>
 
-### 🏁 [Conclusion]():
+## 🏁 [Conclusion]():
 
 - **Optimal solution:** $x_1 = 3$, $x_2 = 0$
 - **Maximum value:** $Z = 12$