Open active file on GitLab does not resolve from git repository root

Summary

When opening a subfolder of a git repository in VS Code Open active file on GitLab resolves to the wrong path on GitLab.

Steps to reproduce

• Clone this repository (or any other that has a subfolder): https://gitlab.com/hffmnn/open-active-file-issue
• Open subfolder as VS Code root folder: cd app && code helloWorld.txt
• Trigger the Open active file on GitLab action

What is the current bug behavior?

The GitLab page opens up and reads: "helloWorld.txt" did not exist on "main"

The URL tried to open reads: https://gitlab.com/hffmnn/open-active-file-issue/-/tree/main#L1

What is the expected correct behavior?

The file should be opened on GitLab with the selected line highlighted.

Possible fixes

I guess this line of code returns the wrong path: https://gitlab.com/gitlab-org/gitlab-vscode-extension/-/blob/main/src/openers.js#L46. Instead of returning sth. like app/helloWorld.txt it only returns helloWorld.txt.