fix: Add default workspace to github message marker

[ancosma]

Fixes #3068

Proposed Changes

1. Add default workspace to github message marker when it is not same path as github workspace path.

Readiness Checklist

Author/Contributor

• Add entry to the CHANGELOG listing the change and linking to the corresponding issue (if appropriate)
• If documentation is needed for this change, has that been included in this pull request

Reviewing Maintainer

• Label as breaking if this is a large fundamental change
• Label as either automation, bug, documentation, enhancement, infrastructure, or performance

[nvuillam]

Would it be also possible to make such update for gitlab, azure and bitbucket users ? :)

[ancosma]

I could try, but since I don't know how other workflows work and which env variables are exposed, I'd like to let the task for someone who uses them actively.

[github-actions]

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