The default branch is known as master in the repo will be renamed main soon.

For more details, Please refer to https://github.com/github/renaming
This process involves:
- Creating a new branch main as a copy of master
- Making that branch the default for the repository
- Rebasing all PRs to be based on main
- Adding a document for developers to understand what to do on their systems
To bring your local copy into line with the renamed branch (e.g., main)in the repository, please follow these steps:
```
# Fetch the latest branches from the remote.
git fetch --all
```

Update the upstream remote's HEAD.

git remote set-head origin -a

Switch your local branch to track the new remote branch.

git branch --set-upstream-to origin/main

git branch -m master main