[ie/zetland] Add extractor (#9116)

Closes #9024
Authored by: HobbyistDev

yt_dlp/extractor/_extractors.py

@@ -2496,6 +2496,7 @@ from .zee5 import (
     Zee5SeriesIE,
 )
 from .zeenews import ZeeNewsIE
+from .zetland import ZetlandDKArticleIE
 from .zhihu import ZhihuIE
 from .zingmp3 import (
     ZingMp3IE,