Update 20211028.md

Supporting Documentation/Meeting Notes/20211028.md

+
 **Agenda:**
 
 | What | Who | Time |
@@ -29,6 +30,9 @@ _Notes:_
 - Sarah's podcast interview!
     - Podcast is out! Watch it [here](https://www.youtube.com/watch?v=B0jWl6bGs4s) 
 
+-  a low volume announcement mailing list for IEEE SA OPEN is live -- fewer than 2 emails/month on average. Please subscribe and encourage others to do so as well. Thank you!
+https://listserv.ieee.org/cgi-bin/wa?SUBED1=SAOPEN-ANNOUNCE&A=1 
+
 
 **Event Updates**
 
@@ -36,6 +40,8 @@ _Notes:_
     - Emily, Silona, and Raul attended
     - Great conversations on what IEEE SA OPEN is and about the community
 
+    - Social media 
+