Fix for GHA testing workflow

[Springstone]

Overview/Summary

Fix for the GHA workflow that test portal deployments.

As part of this Pull Request I have

• [ ] Checked for duplicate Pull Requests
• [ ] Associated it with relevant issues, for tracking and closure.
• [ ] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [ ] Performed testing and provided evidence.
• [ ] Ensured contribution guidance is followed.
• [ ] Updated relevant and associated documentation.
• [ ] Updated the "What's New?" wiki page (located: /docs/wiki/whats-new.md)