ci: update token reference for pushing generated changes

[paul58914080]

Description

Closes :

Checklist:

• My code follows the contribution guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• My commits follow conventional commit message guidelines

[Copilot]

Pull Request Overview

This PR updates the CI workflow to streamline token usage for pushing generated changes by removing the environment variable declaration and directly referencing the secret in the git push command.

• Simplifies the token reference pattern by eliminating the intermediate environment variable
• Maintains the same functionality while reducing configuration overhead