Corrected typos in mermaid diagram

TS-0020-WebSocket_Protocol_Binding.md

@@ -158,14 +158,14 @@ Note over ADN-AE, WS client: 1) AE wants to start registration<br/>procedure and
 WS client ->> WS server: 2) Client handshake
 WS server ->> WS client: 3) Server handshake
 ADN-AE ->> WS client: 4) Request primitive
-Note over WS client: 5) Websocket binding
+Note over WS client: 5) WebSocket binding
 WS client ->> WS server: 6) WebSocket message
 Note over WS server: 7) Unpacking request primitive
 WS server ->> CSE: 8) Request primitive
 Note over CSE: 9) Receiver side processing<br/>of AE registration procedure
 CSE ->> WS server: 10) Response primitive
 Note over WS server: 11) WebSocket Binding
-WS server ->> WS client: 12) Websocket message
+WS server ->> WS client: 12) WebSocket message
 Note over WS client: 13) Unpacking response primitive
 WS client ->> ADN-AE: 14) Response primitive
 Note over ADN-AE, CSE: 15) non-registration CRUDN operations