Fix bounding box example (#360)

I realized the example I added for bounding box mode was accessing the
ROIs in the wrong spot. Just a tiny docstring update in this PR.

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Co-authored-by: Auto-format Bot <autoformatbot@groundlight.ai>

Author: f-wright

src/groundlight/experimental_api.py

@@ -1011,7 +1011,8 @@ def create_bounding_box_detector(  # noqa: PLR0913 # pylint: disable=too-many-ar
             # Use the detector to find people in an image
             image_query = gl.ask_ml(detector, "path/to/image.jpg")
             print(f"Confidence: {image_query.result.confidence}")
-            print(f"Bounding boxes: {image_query.result.rois}")
+            print(f"Label: {image_query.result.label}")
+            print(f"Bounding boxes: {image_query.rois}")
 
         :param name: A short, descriptive name for the detector.
         :param query: A question about the object to detect in the image.