fix: correct commit url to support self-hosted ghe instance

[tvcsantos]

Motivation and Context

Currently on self-hosted instances the commit url in output is wrong and pointing to github.com. This PR addresses that problem by using the out-of-the-box available environment variable GITHUB_SERVER_URL in order to point to the correct URL.

Description

Change code to use the out-of-the-box available environment variable GITHUB_SERVER_URL in order to point to the correct commit URL.

How Has This Been Tested?

Screenshot(s)/recordings(s)

Types of changes

• [x] 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)

Checklist

• [x] This PR's code follows as closely as possible the coding style/guidelines of this project.
• [ ] I have added error reporting and followed the error reporting guidelines.
• [ ] I have added event tracking and followed the event tracking guidelines.
• [ ] I have updated any relevant documentation accordingly to reflect this PR's changes.
• [ ] I have added automated tests (unit/integration/e2e/other) to cover my changes.
• [ ] All new and existing tests pass locally (excluding flaky CI tests).

[tvcsantos]

If you need something extra tell me. Thanks for the project 💪