- This workflow will automatically apply labels to PRs based on the
  branch name.

- This will help us to filter out PRs intended for a specific branch e.g
  PG11, PG12, PG13, PG14, PG15, master and any PR for other ongoing
  project branches.

- Currently it supports only PG11, PG12, PG13, PG14, PG15 and master. We
  can add more by adding a new entry in the .github/labeler.yml file.