Add comment for twilio call direction (#1260)

* Add comment for twilio call direction

* generated protobuf

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Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: cnderrauber

livekit/livekit_connector_twilio.pb.go

@@ -24,7 +24,9 @@ import "livekit_agent_dispatch.proto";
 message ConnectTwilioCallRequest {
 
   enum TwilioCallDirection {
+    // Call is inbound to LiveKit from Twilio
     TWILIO_CALL_DIRECTION_INBOUND = 0;
+    // Call is outbound from LiveKit to Twilio
     TWILIO_CALL_DIRECTION_OUTBOUND = 1;
   }