Rename section 2.2.2 to 'Master Data'

Author: trevmon28

docs/training-material/Mobile-Phone-Data-For-Policy-Technical.md

@@ -13,7 +13,7 @@ This course delivers a comprehensive overview of the technical knowledge needed
 | 2.0 Recap of MPD Fundamentals | [YouTube video] | [Slides](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/2.0%20Recap%20of%20fundamentals%20of%20MPD%2C%20data%20types%2C%20data%20pipelines%2C%20data%20products.pdf) |
 | 2.1 Intro to MPD Policy Use Cases | - [Disaster](https://youtu.be/oNpgWplJDeI)<br> - [Transport](https://youtu.be/f4AiprP69fQ)<br> - [Tourism](https://youtu.be/2ZxCdnMZkJE) | - [Disaster](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/Copy%20of%20Module%202%20Use%20Case_Disaster%20Management.pdf)<br> - [Transport](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/Copy%20of%20Module%202%20Use%20Case_Transportation%20and%20commuting.pdf)<br> - [Tourism](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/Copy%20of%20Modue%202%20Use%20Case_Tourism.pdf)|
 | 2.2.1 Mobile Phone Data | [YouTube video] | [Slides](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/2.2.1.%20Mobile%20Phone%20Data.pdf) |
-| 2.2.2 |  | |
+| 2.2.2 Master Data |  | |
 | 2.3.1 Multi-MNO | [YouTube Video] | [Slides](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/2.3.1%20Multi-MNO.pdf) |
 | 2.3.2 Designing MPD for Policy Pipelines | [YouTube video](https://youtu.be/FVv5BJEECkk) | [Slides](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/2.3.2%20Designing%20Pipelines.pdf) |
 | 2.3.3 Privacy-by-Design for MPD Pipelines | [YouTube video](https://youtu.be/Xr6NcMWS2-0) | [Slides](https://github.com/worldbank/GDF-MPD/blob/main/docs/training-material/2.3.3%20Privacy-by-design.pdf) |