Update README.md

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

Author: FabianaCampanari

README.md

@@ -105,6 +105,7 @@ https://github.com/user-attachments/assets/4ccd316b-74a1-4bae-9bc7-1c705be80498
    - I - [class 1 - Intoductioon and Assessment](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/a98512aa9dc2525446a3ffb236d06cbfb16d1f43/class_1-Introduction)
    - II - [class_2 - Introduction - Data Mining With Python](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/a98512aa9dc2525446a3ffb236d06cbfb16d1f43/class_2%20-%20Introduction%20-%20Data%20Mining%20With%20Python)
    - III - [class_3 - Stats Review](https://github.com/Quantum-Software-Development/specialized-consulting-data-mining/tree/a98512aa9dc2525446a3ffb236d06cbfb16d1f43/class_3%20-%20Stats%20Review)
+   - IV - [Data Cleaning by Zara Amim]()
 2. [Objectives](#objectives)
 3. [Syllabus](#syllabus)
 4. [Weekly Schedule](#weekly-schedule)