adding dataset disclaimer in evo2 lora notebook (NVIDIA-BioNeMo#1581)

### Description
Adding a dataset disclaimer for usage of
`nucleotide_transformer_downstream_tasks` dataset

#### Usage

<!--- How does a user interact with the changed code -->

```python
TODO: Add code snippet
```

### Type of changes

<!-- Mark the relevant option with an [x] -->

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Refactor
- [X] Documentation update
- [ ] Other (please describe):


### Pre-submit Checklist

<!--- Ensure all items are completed before submitting -->

- [ X] I have tested these changes locally
- [X ] I have updated the documentation accordingly
- [ X] I have added/updated tests as needed
- [ X] All existing tests pass successfully

Signed-off-by: Zoey Zhang <zozhang@nvidia.com>

Author: zoeyz101

bionemo-recipes/recipes/evo2_megatron/examples/lora-fine-tuning-tutorial.ipynb

@@ -93,6 +93,14 @@
     "underlying mapping has shifted in a future release; flip the names list and re-run."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "cell-003a",
+   "metadata": {},
+   "source": [
+    "> Running this code will automatically download data from the [Nucleotide Transformer downstream-tasks suite](https://huggingface.co/datasets/InstaDeepAI/nucleotide_transformer_downstream_tasks_revised). Before you run the code, please confirm the content of the dataset and licensing is appropriate for your intended use."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 2,