Fix unsupported grouping mermaid feature

TS-0020-WebSocket_Protocol_Binding.md

@@ -153,19 +153,11 @@ Figure 5.2-2 shows an example message flow for a scenario where an ADN-AE regist
 ```mermaid
 %%{init: { 'sequence': {'mirrorActors': false, 'actorFontSize': 2, 'noteFontSize':10} } }%%
 sequenceDiagram
-box ADN 
-	Participant AE
-	Participant WS client
-end
-box MN
-	Participant WS server
-	Participant CSE
-end
-
-Note over AE, WS client: 1) AE wants to start registration<br/>procedure and triggers<br/>WebSocket connection<br/>establishment
+
+Note over ADN-AE, WS client: 1) AE wants to start registration<br/>procedure and triggers<br/>WebSocket connection<br/>establishment
 WS client ->> WS server: 2) Client handshak
 WS server ->> WS client: 3) Server handshake
-AE ->> WS client: 4) Request primitive
+ADN-AE ->> WS client: 4) Request primitive
 Note over WS client: 5) Websocket binding
 WS client ->> WS server: 6) WebSocket message
 Note over WS server: 7) Unpacking request primitive
@@ -175,8 +167,8 @@ CSE ->> WS server: 10) Response primitive
 Note over WS server: 11) WebSocket Binding
 WS server ->> WS client: 12) Websocket message
 Note over WS client: 13) Unpacking response primitive
-WS client ->> AE: 14) Response primitive
-Note over AE, CSE: 15) non-registration CRUDN operations
+WS client ->> ADN-AE: 14) Response primitive
+Note over ADN-AE, CSE: 15) non-registration CRUDN operations
 ```
 
 **Figure 5.2-2: Example message flow with WebSocket binding**