CI/CD: sync main to master, update github action

[jotaesteves]

Changes

• adds main branch
• updates GitHub Actions to include mainbranch

Description

This PR represents a change in the default branch naming convention from master to main as part of our ongoing effort to use more inclusive language throughout our development practices.

Instructions for Team Members

For local repositories:
After this PR is merged, you will need to update your local clones to track the new main branch. You can do this by running the following commands in your local repository:

git branch -m master main
git fetch origin
git branch -u origin/main main
git remote set-head origin -a