fix: restrict git log output

[GR3YH4TT3R93]

What

What does this pull request accomplish?

• [x] restrict log output from showing signatures

How

What code changes were made to accomplish it?

• Modify the git log command to ensure log.showSignature = false while running Co-Author

Why

• [x] this fixes the issue where Co-Author menu is filled with commit signature checks

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] New and existing unit tests pass locally with my changes

[2KAbhishek]

Thanks for the fix!