🐞 Added Step 5 to README

[ruchithavemula]

Added Step 5: Pushing the Code in the README.md to maintain the correct sequence of steps and guide contributors on how to push their branch to GitHub using:

git push --set-upstream origin branch-name

This fixes the issue where Step 5 was missing between Step 4 (Commiting and Pushing) and Step 6 (Create Pull Request).