Add nnDetection fine-tuning link

README.md

@@ -34,7 +34,7 @@ with the [`nnssl`](https://github.com/MIC-DKFZ/nnssl) self-supervised learning f
 To fine-tune nnFoundation on your own downstream tasks, use one of our dedicated repositories:
 
 - **Segmentation:** [nnU-Net -- Fine-tuning from nnssl checkpoints](https://github.com/MIC-DKFZ/nnUNet/blob/master/documentation/finetuning_from_nnssl_checkpoints.md)
-- **Detection:** TBA
+- **Detection:** [nnDetection -- Fine-tuning](https://github.com/MIC-DKFZ/nnDetection/blob/finetuning/docs/finetuning.md)
 - **Classification:** TBA
 - **Report generation:** TBA