Add CNCF Community Group to assets.md (#2166)

* Add CNCF Community Group to assets.md

* Clarify addding/removing organizers

* GC members can admin the group via Service Desk tickets

assets.md

@@ -127,6 +127,23 @@ Link: https://pypi.org/user/opentelemetry/
 
 ## Communication channels
 
+### CNCF Community Group
+
+Used by the End-User SIG to organize events (e.g. OTel Q&A, OTel in Practice, feedback sessions, etc.).
+
+CNCF are the owners of the group, so certain requests (e.g. adding/removing organizers) need to be requested via on of these:
+
+* CNCF Service Desk
+* https://github.com/cncf/communitygroups/issues
+
+Link: https://community.cncf.io/opentelemetry/
+
+- Owners: CNCF
+- Lead Organizers (i.e. admins):
+  - [@open-telemetry/sig-end-user-approvers](https://github.com/orgs/open-telemetry/teams/sig-end-user-approvers): listed on group page, registered using their personal CNCF Community accounts.
+  - [@open-telemetry/governance-committee](https://github.com/orgs/open-telemetry/teams/governance-committee) who can request changes via CNCF Service Desk tickets.
+
+
 ### opentelemetry-calendar-contributors Google Group
 
 Used to provide write access to public OpenTelemetry calendar. See [docs/how-to-handle-public-calendar.md](docs/how-to-handle-public-calendar.md).