Add spider chi_ssa_64

[DiegoCaraballo]

Summary

Issue: #909

Checklist

All checks are run in GitHub Actions. You'll be able to see the results of the checks at the bottom of the pull request page after it's been opened, and you can click on any of the specific checks listed to see the output of each step and debug failures.

• [ ] Tests are implemented
• [ ] All tests are passing
• [ ] Style checks run (see documentation for more details)
• [ ] Style checks are passing
• [ ] Code comments from template removed

Questions

Include any questions you have about what you're working on.

[DiegoCaraballo]

@pjsier Ok, I will make the corresponding changes. Regards