docs:bio: add no_display=true to circos iframe example

Author: smallstepman

doc/python/bio-circos.md

@@ -108,7 +108,7 @@ dash_bio.Clustergram(
 
 ## Circos with Dash
 
-```python
+```python no_display=true
 from IPython.display import IFrame
 snippet_url = 'https://dash-gallery.plotly.host/python-docs-dash-snippets/'
 IFrame(snippet_url + 'bio-circos', width='100%', height=630)