fix dataset info

Author: rcannood

results/cyto_batch_integration/data/dataset_info.json

@@ -4,8 +4,8 @@
     "dataset_name": "Leomazzi_data_subset",
     "dataset_summary": "Flow cytometry data of spleens of 9 mice, subsampled to 1000 cells per sample.",
     "dataset_description": "Flow cytometry data of spleens from 4 WT (IKK2 fl/fl CD11c-cre +/+) and 5 KO (IKK2 fl/fl CD11c-cre Tg/+) B6 mice,  measured with a 22-color panel on 2 different instrument settings. Subsampled to 1000 cells per sample. Data has been preprocessed (compensated witha batch-specific compensation matrix, logicle transformed, cleaned with PeacoQC and pregated on live single CD45+ cells).",
-    "data_reference": "",
-    "data_url": "",
+    "data_reference": null,
+    "data_url": null,
     "date_created": "19-03-2025",
     "file_size": 1444801
   }