add new mimetype being emited

Author: mmcky

lectures/_config.yml

@@ -41,6 +41,7 @@ sphinx:
        # HTML
        ['html', 'application/vnd.jupyter.widget-view+json', 10],
        ['html', 'application/javascript', 20],
+       ['html', 'application/vnd.colab-display-data+json', 25],
        ['html', 'text/html', 30],
        ['html', 'text/latex', 40],
        ['html', 'image/svg+xml', 50],