Change header from H1 to H2 for Stats Review

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

Author: FabianaCampanari

README.md

@@ -663,7 +663,7 @@ Visualizations: Histograms, bar plots, and time series chart.
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-# III - [class_3 - Stats Review](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/86d9d9fbc56efdd0b8e377955c1c7abf8879b775/class_3%20-%20Stats%20Review)
+## III - [class_3 - Stats Review](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/86d9d9fbc56efdd0b8e377955c1c7abf8879b775/class_3%20-%20Stats%20Review)
 
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