Update GitHub Actions summary example in README.md

[iamdharmesh]

Description of the Change

PR makes minor changes in the GitHub Actions summary example in README.md to stop the 404 Not Found error when trying to convert JSON to MD. More information about the error can be found on the reported issue.

Closes #18

How to test the Change

Verify the readme content via GitHub UI.

Changelog Entry

Changed - GitHub Actions summary example in README.md

Credits

Props @iamdharmesh @jeffpaul @B-Interactive

Checklist:

• [x] I agree to follow this project's Code of Conduct.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my change.
• [ ] All new and existing tests pass.