Adding Harness documentation to CI integrations overview

[Olgaminch7]

Edit Documentation

Description

Adding link to the Harness documentation on Sauce Labs integration

Motivation and Context

Access to Harness Connectivity with Sauce Labs

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Documentation fix (typos, incorrect content, missing content, etc.)

Checklist

• [x] I have read the contributing document.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.