Update to add links to other AGs

README.md

@@ -17,6 +17,10 @@ Our current active subgroups are listed below.  If you are interested in contrib
 
 * [Feature and Tool Evaluation Group](https://opensource.ieee.org/technical-advisory-group/feature-tool-evaluations)
 
+**Related Groups:**
+* [Community Advisory Group](https://opensource.ieee.org/Community-advisory-group/)
+* [Marketing Advisory Group](https://opensource.ieee.org/Marketing-advisory-group/)
+
 ## Related Files
 
 * [Purpose](https://opensource.ieee.org/technical-advisory-group/about/-/blob/main/Supporting%20Doumentation/tag-purpose.md)