Fix: Tweak link transformation for absolute paths in source repo

[ByteOtter]

What this PR does / why we need it:

Tweaks link transformation to deal with absolute paths in source repo for media.
Relative paths have proven to be too flaky for the approach we chose for documentation. I have fixed this manually in the gardenlinux repo by switching to absolute path for media assets in gardenlinux/gardenlinux@c4b1d8d

Which issue(s) this PR fixes:
Fixes n/A

Definition of Done:

• The code is sufficiently documented
• Shared the changes with the Team so everyone is aware
• The code is appropriately tested
• Checked if the code needs to be backported to release branches of maintained versions (perform the actual backport after the merge to main)

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[yeoldegrove]

@ByteOtter Is this ready to review or do we need changes after our last discussions?

[ByteOtter]

@ByteOtter Is this ready to review or do we need changes after our last discussion

Well it still doesnt work 100 percent so Im gonna continue working on this