Description

Updates the test runner badge to track the runs on main.

Motivation and Context

The develop workflow is run on merges to main, which is really what we want to track in this badge, rather than arbitrary runs from PRs that might be failing, which is what we're getting now.

How Has This Been Tested?

Viewed the badge in this branch.

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 not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.