Add reference and link to specific SD version

Proposing to add a reference to the specific SD version, as we've found in concurrent work that the diversity of outputs varies significantly across major versions (v1 vs v2)

app.py

@@ -35,7 +35,7 @@ with gr.Blocks() as demo:
     gr.Markdown("#### Choose from the occupations below to compare how Stable Diffusion (left) and Fair Diffusion (right) represent different professions.")
     with gr.Row():
         with gr.Column():
-            gr.Markdown('## Stable Diffusion Generations')
+            gr.Markdown('## [Stable Diffusion v1-5](https://huggingface.co/runwayml/stable-diffusion-v1-5) Generations')
             choice1 = gr.Dropdown(professions, label = "Choose a profession", multiselect= False, interactive=True)
             images1 = gr.Gallery(label="Images").style(grid=[3], height="auto")
         with gr.Column():