Link from a uses: with unspecified version goes to tree/undefined

[bcye]

Describe the bug
When writing uses: actions/checkout in a file, ctrl + clicking it to open in web browser opens it to github.com/actions/checkout/tree/undefined

To Reproduce

1. Create workflow with uses: actions/checkout in a step
2. ctrl + click it to go to github
3. 404 page as there is no undefined tag

Expected behavior
It should go to the repository main page

Extension Version
v0.27.2

Additional context
It would be cool to know the latest version of that module in the highlight.