update README.md

Author: iam-veeramalla

README.md

@@ -7,7 +7,7 @@
 - Installing Python and setting up a development environment.
 - Writing your first Python program.
 
-## Day 2: Working with Strings and Numbers
+## Day 2: Intro to Datatypes, Working with Strings and Numbers
 - String data type in Python.
 - String manipulation and formatting.
 - Regular expressions for text processing.