etcd-io/etcd etcd-io#479 meeting is now on CNCF-funded Zoom channel

Also, remove outdated meeting phone number

Signed-off-by: Xuan Nguyen <[email protected]>

README.md

@@ -148,9 +148,7 @@ Meeting recordings are uploaded to official etcd [YouTube channel].
 
 Get calendar invitation by joining [etcd-dev](https://groups.google.com/g/etcd-dev) mailing group.
 
-Join Hangouts Meet: [meet.google.com/umg-nrxn-qvs](https://meet.google.com/umg-nrxn-qvs)
-
-Join by phone: +1 405-792-0633‬ PIN: ‪299 906‬#
+Join CNCF-funded Zoom channel: [zoom.us/my/cncfetcdproject](https://zoom.us/my/cncfetcdproject)
 
 [shared-meeting-notes]: https://docs.google.com/document/d/16XEGyPBisZvmmoIHSZzv__LoyOeluC5a4x353CX0SIM/edit
 [YouTube channel]: https://www.youtube.com/channel/UC7tUWR24I5AR9NMsG-NYBlg