chore: update wss url to ws in .env.example (#3081)

.env.example

@@ -51,7 +51,7 @@ VITE_ADMIN_URL=http://localhost:3100
 
 # Backend URLs
 VITE_BACKEND_GQL_URL=http://localhost:3170/graphql
-VITE_BACKEND_WS_URL=wss://localhost:3170/graphql
+VITE_BACKEND_WS_URL=ws://localhost:3170/graphql
 VITE_BACKEND_API_URL=http://localhost:3170/v1
 
 # Terms Of Service And Privacy Policy Links (Optional)