Update README.md

Author: pragyakhanna11

Diff for: PyGamesScripts/Sudoku/README.md

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 It provides you with a sudoku puzzle and you can choose the level. Once done you can also check the puzzle. Puzzle will turn red if incorrect.
 
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+## About Sudoku: 
+- Sudoku is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers so that each row, column and 3×3 section contain all of the digits between 1 and 9. As a logic puzzle, Sudoku is also an excellent brain game. 
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+------------
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 ## Code Description:
 - This program consists of 4 files:
   - main.py
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 ## Author:
-Pragya Khanna
+[Pragya Khanna](https://github.com/pragyakhanna11)