fix: update DatasetFormat key name for sagemakerCaptureJson (#1505)

Co-authored-by: Chuyang Deng <[email protected]>

Author: chuyang-deng

src/sagemaker/model_monitor/dataset_format.py

@@ -58,4 +58,4 @@ def sagemaker_capture_json():
             dict: JSON string containing DatasetFormat to be used by DefaultModelMonitor.
 
         """
-        return {"sagemaker_capture_json": {}}
+        return {"sagemakerCaptureJson": {}}