fix: use GITHUB_ACTOR in git config

[vil02]

Description of Change

Properly evaluates GITHUB_ACTOR. TheAlgorithms/Rust#647 contains the description of the problem, which this PR solves.

References

Same as TheAlgorithms/Rust#647.

Checklist

• Added description of change
• Added tests and example, test must pass
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes:
cf. TheAlgorithms/Rust#647

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[vil02]

Please don't close.

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[vil02]

Please don't close.

Or merge.

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[vil02]

Please don't close.

Or merge.

Or anything...