docs(contributing): add instructions for creating a branch (#653)

[joshua-jinu]

docs(contributing): add instructions for creating a branch (#653)

Fixes Issue

My PR closes #653

👨‍💻 Changes proposed(What did you do ?)

I've added the step by step process to create a branch, commit changes to that branch and push the changes to the that particular branch.

✔️ Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] This PR does not contain plagiarized content.
• [x] The title and description of the PR is clear and explains the approach.

Note to reviewers

📷 Screenshots

[vercel[bot]]

@joshua-jinu is attempting to deploy a commit to the dunsin's projects Team on Vercel.

A member of the Team first needs to authorize it.

[Dun-sin]

Your pull request is rejected, reason 👉🏾is here👈🏾

Thanks for wanting to contribute, I hope you continue to do so properly.