docs: fix starter script to replace all usernames

[moontai0724]

Description of change

This PR fixes the starter script that provided in the README.

Currently the username replacement does not work, this changed script will replace all but not started by @ to keep dependencies.

Pull-Request Checklist

• Code is up-to-date with the main branch
• npm run lint passes with this change - N/A: no logic code being modified
• npm run test passes with this change - N/A: no logic code being modified
• This pull request links relevant issues as Fixes #0000 - No issues
• There are new or updated unit tests validating the change - N/A: no logic code being modified
• Documentation has been updated to reflect this change
• The new commits follow conventions outlined in the conventional commit spec