Adding the CoC section

Author: Cheukting

_posts/2019-06-26-pandas-viz2.md

@@ -74,3 +74,8 @@ The day of the sprint
 
 - Bring your own laptop if you can
 - Join the [Gitter channel](https://gitter.im/py-sprints/pandas-bokeh) of the sprint
+
+Code of Conduct
+---------------
+
+- Please be reminded that all participants are expected to follow the [NumFOCUS Code of Conduct](https://numfocus.org/code-of-conduct)