Update seminar organisers (#1619)

Author: graeme-a-stewart

_meetings/hsf-seminars.md

@@ -18,7 +18,7 @@ The schedule for past and future meetings is published in
 
 ## Organisers
 
-The seminar organisers are Benedikt Hegner, Michel Jouvin and Andra Valassi, or
+The [seminar organisers](mailto:[email protected],[email protected],[email protected]) are Benedikt Hegner, Michel Jouvin and Nicole Skidmore, or
 you can contact the [HSF Steering Group](mailto:[email protected])
 or any of our [activity area]({{ site.baseurl }}/what_are_activities.html)
 coordinators to suggest or volunteer any topics that you would like to see in