update documentation (#1900)

README.md

@@ -541,7 +541,7 @@ rtmp_conns{id="[id]",state="[state]"} 1
 rtmp_conns_bytes_received{id="[id]",state="[state]"} 1234
 rtmp_conns_bytes_sent{id="[id]",state="[state]"} 187
 
-# metrics of every WebRTC connection
+# metrics of every WebRTC session
 webrtc_sessions{id="[id]"} 1
 webrtc_sessions_bytes_received{id="[id]",state="[state]"} 1234
 webrtc_sessions_bytes_sent{id="[id]",state="[state]"} 187

apidocs/openapi.yaml

@@ -1130,7 +1130,7 @@ paths:
   /v2/webrtcsessions/list:
     get:
       operationId: webrtcSessionsList
-      summary: returns all WebRTC connections.
+      summary: returns all WebRTC sessions.
       description: ''
       parameters:
       - name: page