Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: kranthipoturaju

README.md

@@ -122,13 +122,13 @@ Default: `https://github.com/conventional-changelog/commitlint/#what-is-commitli
 
 When set to a valid Integer value - X, considers only the latest X number of commits.
 
-Default: `null` (Equivalent to linting all commits)
+Default: empty (leaving it empty lints all commits)
 
 ### `token`
 
 Personal access token (PAT) used to interact with the GitHub API.
 By default, the automatic token provided by GitHub is used.
-You can see more info about GitHub's automatic token [here](https://docs.github.com/en/actions/tutorials/authenticate-with-github_token).
+You can see more info about GitHub's automatic token [here](https://docs.github.com/actions/security-guides/automatic-token-authentication).
 
 Default: `${{ github.token }}`