[WIP] Fix CI badge to show correct status in README

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[bug] the CI badge in README always shows "main failing"</issue_title>
<issue_description> the below CI badge in README always shows "main failing", even when the CI is actually successful. need to fix the badge to show the real status of CI

[![GitHub Actions](https://github.com/casbin/node-casbin/workflows/main/badge.svg)](https://github.com/casbin/node-casbin/actions)
```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes [bug] the CI badge in README always shows "main failing" #531

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[coveralls]

Pull Request Test Coverage Report for Build 20376451504

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 78.299%

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Totals
Change from base Build 20375766074:	0.0%
Covered Lines:	1625
Relevant Lines:	1977

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💛 - Coveralls