[docs] Update link in working_with_auxiliary_data.md (#598)

* Update link in working_with_auxiliary_data.md

* fixed url

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Co-authored-by: Quoc-Tuan Truong <tqtg@users.noreply.github.com>

tutorials/working_with_auxiliary_data.md

@@ -85,4 +85,4 @@ CDL |     0.5494 |   42.1279 |   0.3018
 
 ## Other Modality classes
 
-The usage of the `GraphModality` and `ImageModality`, to deal with graph and visual auxiliary data, follows the same principles as above. The [c2pf_example](../examples/c2pf_example.py) and [mcf_example](../examples/mcf_office.py) involve the `GraphModality` class to handle item network. For the `ImageModality`, one may refer to the [vbpr_tradesy](../examples/vbpr_tradesy.py) example. The `cornac.data` module's [documentation](https://cornac.readthedocs.io/en/latest/data.html) is also a good resource to know more about the modality classes. 
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+The usage of the `GraphModality` and `ImageModality`, to deal with graph and visual auxiliary data, follows the same principles as above. The [c2pf_example](../examples/c2pf_example.py) and [mcf_example](../examples/mcf_office.py) involve the `GraphModality` class to handle item network. For the `ImageModality`, one may refer to the [vbpr_tradesy](../examples/vbpr_tradesy.py) example. The `cornac.data` module's [documentation](https://cornac.readthedocs.io/en/stable/api_ref/data.html#module-cornac.data.modality) is also a good resource to know more about the modality classes.