Add contribution workflow to README

Author: ayesha-shaik08

README.md

@@ -47,3 +47,8 @@ We are on [Discord](https://the-algorithms.com/discord)! Community channels are
 ## 📜 List of Algorithms
 
 See our [directory](DIRECTORY.md) for easier navigation and a better overview of the project.
+
+## Contribution
+This project demonstrates the GitHub fork-and-pull request workflow.
+Changes are made on a separate branch and reviewed through a pull request.
+The changes are merged after review and approval.