Update introduction.md

Author: isangwanrahul

bootcamp/introduction.md

@@ -22,6 +22,10 @@ This will be six weeks of curricula
 - Data Quality (analytics)
 - Data Quality (infrastructure)
 - Data impact and visualization (analytics)
+  - Day 1 Lecture is [here](https://www.dataexpert.io/lesson/data-visualization-and-impact-day-1-lecture-yt)
+  - Day 1 Lab is [here](https://www.dataexpert.io/lesson/data-visualization-and-impact-day-1-lab-yt)
+  - Day 2 Lecture is [here](https://www.dataexpert.io/lesson/data-visualization-and-impact-day-2-lecture-yt)
+  - Day 2 Lab is [here](https://www.dataexpert.io/lesson/data-visualization-and-impact-day-2-lab-yt)
 - Data pipeline maintenance (infrastructure)
   - Homework is [here](materials/6-data-pipeline-maintenance/homework/homework.md)
   - Day 1 Lecture is [here](https://www.dataexpert.io/lesson/data-pipeline-maintenance-day-1-lecture-yt)