Add image showing dashboard visualization

Author: strickvl

pipelines/visualizations/visualizations-dashboard.png

@@ -26,6 +26,8 @@ def scatter(df: pd.DataFrame) -> Annotated[HTMLString, "scatter_plot"]:
 - **HTMLString type** lets you embed rich content in the dashboard
 - **Dashboard integration** makes results easily shareable
 
+![Two visualizations generated by this pipeline](./pipelines/visualizations/visualizations-dashboard.png)
+
 ## Try it yourself
 
 Run this pipeline and check the dashboard to see both the automatic DataFrame