Fix docs broken link to datatumaro_h-label

Signed-off-by: Songki Choi <[email protected]>

Author: Songki Choi

docs/source/guide/explanation/algorithms/classification/hierarhical_classification.rst

@@ -39,7 +39,7 @@ Dataset Format
 .. _hierarchical_dataset:
 
 For hierarchical image classification, we created our custom dataset format that is supported by `Datumaro <https://github.com/openvinotoolkit/datumaro>`_.
-An example of the annotations format and dataset structure can be found in our `sample <https://github.com/openvinotoolkit/training_extensions/tree/develop/data/datumaro_h-label>`_.
+An example of the annotations format and dataset structure can be found in our `sample <https://github.com/openvinotoolkit/training_extensions/tree/develop/tests/assets/datumaro_h-label>`_.
 
 To use OpenVINO™ Training Extensions with this format, it is required to pass dataset root paths directly to the CLI command:
 
@@ -66,4 +66,4 @@ We use the same model templates as for Multi-class Classification. Please, refer
 .. Incremental Learning
 .. ********************
 
-.. To be added soon
+.. To be added soon