Update to add AG links

README.md

@@ -46,6 +46,10 @@ The [Naming Advisory Group](https://opensource.ieee.org/community-advisory-group
 
 [Community Documentation and Templates](https://opensource.ieee.org/documentation-and-templates) for all parts of the IEEE SA OPEN community are available for your use.
 
+**Related Groups:**
+* [Marketing Advisory Group](https://opensource.ieee.org/marketing-advisory-group/)
+* [Technical Advisory Group](https://opensource.ieee.org/technical-advisory-group/)
+
 
 ## Code of Conduct