Update README.md

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

Author: FabianaCampanari

README.md

@@ -135,7 +135,7 @@ Enable students to **plan, conduct, and complete a research project** applying k
 | 1     | [Course introduction](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/d737ff164c6b4d6e580d5ba6e95c54ac604f7ea4/class_1-Introduction) | Active methodology | – |
 | 2–3   | [Statistical Review](https://github.com/Quantum-Software-Development/2-3-DataMining_Statistical_Review) | Active methodology | Python |
 | 4     | [Fundamentals of Data Mining](https://github.com/Quantum-Software-Development/4-DataMining_Concepts_ExploratoryAnalysis) | Active methodology | Python |
-| 5–6   | Data cleaning and preparation | Active methodology | Python |
+| 5–6   | [Data cleaning and preparation](https://github.com/Quantum-Software-Development/5-DataMining) | Active methodology | Python |
 | 7     | Predictive analysis | Active methodology | Python |
 | 8, 10 | Clustering techniques | Active methodology | Python |
 | 9     |  **P1 Exam** | Written (Individual) | – |