Apparently it was put out fairly quickly, and the thick colour of the smoke should theoretically suggest incomplete combustion, and we can also see smoke stains coming from the aft well deck from the picture of the aft of the ship when the fire was put out, suggesting the fire was definitely at least within the well deck, we don't know where it started however.
Basically it's a question of whether there was any structural damage and/or also if there was any damage to key parts of the ship (like powerplant) which would require cutting a hole in the ship which would be time consuming.
If either of those two were true then we'd probably expect it to go into drydock within the next couple of months to get that stuff sorted out. If the ship doesn't go back into drydock over the next couple of months then I think chances are the damage would probably be relatively minor with associated relatively small delay