Visualization notebook is missing from M2 module

Hi Madeeha,

Thank you for the code examples. I want to bring it to you noticer that `visualization.ipynb` notebook is missing under the Module - M2 Reflection Design Pattern/ungraded-lab/Chart Generation. 

Ref : https://github.com/madeeha96/agentic-ai/blob/main/M2%20Reflection%20Design%20Pattern/ungraded-lab/Chart%20Generation/README.md#files

Would be great if you can add it.