Update README.md

Author: VishalMewadaPackt

README.md

@@ -4,5 +4,5 @@
 #### Please note
 You can download the dataset for the following lessons from the respective URL:
 
-Lesson 07 and Lesson 08: https://github.com/PacktPublishing/Datasets-of-Master-Data-Science-with-Python
-Lesson 07 and Lesson 09 use the same dataset
+Lesson 06 and Lesson 07: https://github.com/PacktPublishing/Datasets-of-Master-Data-Science-with-Python
+Lesson 06 and Lesson 08 use the same dataset