add link to docs

app.py

@@ -144,9 +144,9 @@ with gr.Blocks() as demo:
         "# Base model explorer: explore the lineage of models on the  🤗 Hub"
     )
     gr.Markdown(
-        """When sharing models to the Hub it is possible to specify a base model in the model card, i.e. that your model is a fine-tuned version of [bert-base-cased](https://huggingface.co/bert-base-cased). 
-        This Space allows you to find children models for a given base model and view the popularity of models for fine-tuning.
-        You can also optionally filter by task to see rankings for a particular machine learning task.
+        """When sharing models to the Hub, it is possible to [specify a base model in the model card](https://huggingface.co/docs/hub/model-cards#specifying-a-base-model), i.e. that your model is a fine-tuned version of [bert-base-cased](https://huggingface.co/bert-base-cased). 
+        This Space allows you to find children's models for a given base model and view the popularity of models for fine-tuning.
+        You can also optionally filter by the task to see rankings for a particular machine learning task.
         Don't forget to  ❤  if you like this space 🤗"""
     )