Download and install Github Desktop
Clone the repository Using GitHub Desktop

1. Select the current branch as Development
2. Click fetch origin
3. Create a new Branch under development
eg: Update/Extension

4. Publish the branch
5. open in visual studio code
6. update the extension or theme we want
7. go back to the Git desktop app

Enter the summary(Task number)
Enter description
8. Click the Commit button

9. Click the Push origin button

10. Goto GitHub account
Click the New Pull Request button

11. Choose The Base Branch Development For pull

Select the Reviewer for sending the Request
12. Create Pull Request